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Journal articles on the topic 'Stripe rust'
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1
Lan, C. X., R. P. Singh, J. Huerta-Espino, V. Calvo-Salazar, and S. A. Herrera-Foessel. "Genetic Analysis of Resistance to Leaf Rust and Stripe Rust in Wheat Cultivar Francolin#1." Plant Disease 98, no. 9 (September 2014): 1227–34. http://dx.doi.org/10.1094/pdis-07-13-0707-re.
Full textAbstract:
Leaf rust and stripe rust are important diseases of wheat and can be controlled by growing resistant varieties. We investigated the genetic basis of resistance to both rusts in 198 F5 recombinant inbred lines derived from a cross between ‘Avocet’ and ‘Francolin#1’. The population was phenotyped in greenhouse and field, and genotyped with known gene-associated molecular markers. Seedling resistance of Francolin#1 to leaf and stripe rusts was attributed to the loosely linked genes Lr16 and YrF, respectively, with a recombination frequency of 0.36. Field segregation indicated that adult plant resistance (APR) to leaf and stripe rusts was conferred by three and five additive genes, respectively. Among them, Lr46/Yr29 was associated with resistance to both rusts in Francolin#1, Lr16 reduced field leaf rust severity by 8 to 9%, and YrF contributed to 10 to 25% reductions in stripe rust severity. The Lr16 region was also associated with a 5 to 16% reduction in stripe rust severity, which is likely due to its linkage with YrF or another unidentified stripe rust APR gene. Significant additive effects on stripe rust were detected between YrF and Yr29. We conclude that APR in Francolin#1 to leaf and stripe rusts involves a combination of seedling and APR genes.
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Navabi, A., J. P. Tewari, R. P. Singh, B. McCallum, A. Laroche, and K. G. Briggs. "Inheritance and QTL analysis of durable resistance to stripe and leaf rusts in an Australian cultivar, Triticum aestivum 'Cook'." Genome 48, no. 1 (February 1, 2005): 97–107. http://dx.doi.org/10.1139/g04-100.
Full textAbstract:
An F4-derived F6 recombinant inbred line population (n = 148) of a cross between the durable stripe (yellow) rust (caused by Puccinia striiformis) and leaf (brown) rust (caused by Puccinia triticina) resistant cultivar, Triticum aestivum 'Cook', and susceptible genotype Avocet-YrA was phenotyped at several locations in Canada and Mexico under artificial epidemics of leaf or stripe rusts and genotyped using amplified fragment length polymorphism (AFLP) and microsatellite markers. Durable adult plant resistance to stripe and leaf rusts in 'Cook' is inherited quantitatively and was based on the additive interaction of linked and (or) pleiotropic slow-rusting genes Lr34 and Yr18 and the temperature-sensitive stripe rust resistance gene, YrCK, with additional genetic factors. Identified QTLs accounted for 18% to 31% of the phenotypic variation in leaf and stripe rust reactions, respectively. In accordance with the high phenotypic associations between leaf and stripe rust resistance, some of the identified QTLs appeared to be linked and (or) pleiotropic for both rusts across tests. Although a QTL was identified on chromosome 7D with significant effects on both rusts at some testing locations, it was not possible to refine the location of Lr34 or Yr18 because of the scarcity of markers in this region. The temperature-sensitive stripe rust resistance response, conditioned by the YrCK gene, significantly contributed to overall resistance to both rusts, indicating that this gene also had pleiotropic effects.Key words: wheat, rust diseases, Puccinia striiformis, Puccinia triticina, durable resistance, leaf-tip necrosis, QTL analysis.
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Liu, Weizhen, James Kolmer, Sheri Rynearson, Xianming Chen, Liangliang Gao, James A. Anderson, M. Kathryn Turner, and Michael Pumphrey. "Identifying Loci Conferring Resistance to Leaf and Stripe Rusts in a Spring Wheat Population (Triticum aestivum) via Genome-Wide Association Mapping." Phytopathology® 109, no. 11 (November 2019): 1932–40. http://dx.doi.org/10.1094/phyto-04-19-0143-r.
Full textAbstract:
A previous genome-wide association study (GWAS) for leaf rust (caused by Puccinia triticina) resistance identified 46 resistance quantitative trait loci (QTL) in an elite spring wheat leaf rust resistance diversity panel. With the aim of characterizing the pleiotropic resistance sources to both leaf rust and stripe rust (caused by P. striiformis f. sp. tritici), stripe rust responses were tested in five U.S. environments at the adult-plant stage and to five U.S. races at the seedling stage. The data revealed balanced phenotypic distributions in this population except for the seedling response to P. striiformis f. sp. tritici race PSTv-37. GWAS for stripe rust resistance discovered a total of 21 QTL significantly associated with all-stage or field resistance on chromosomes 1B, 1D, 2B, 3B, 4A, 5A, 5B, 5D, 6A, 6B, 7A, and 7B. Previously documented pleiotropic resistance genes Yr18/Lr34 and Yr46/Lr67 and tightly linked genes Yr17-Lr37 and Yr30-Sr2-Lr27 were also detected in this population. In addition, stripe rust resistance QTL Yrswp-2B.1, Yrswp-3B, and Yrswp-7B colocated with leaf rust resistance loci 2B_3, 3B_t2, and 7B_4, respectively. Haplotype analysis uncovered that Yrswp-3B and 3B_t2 were either tightly linked genes or the same gene for resistance to both stripe and leaf rusts. Single nucleotide polymorphism markers IWB35950, IWB74350, and IWB72134 for the 3B QTL conferring resistance to both rusts should be useful in incorporating the resistance allele(s) in new cultivars.
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Kharouf, Shoula, Shadi Hamzeh, and Mohamad Fawaehz Azmeh. "Races Identification of Wheat Rusts in Syria during the 2019 Growing Season." Arab Journal for Plant Protection 39, no. 1 (March 2021): 1–13. http://dx.doi.org/10.22268/ajpp-39.1.001013.
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Kharouf, Sh., Sh. Hamzeh and M.F. Azmeh. 2021. Races Identification of Wheat Rusts in Syria during the 2019 Growing Season. Arab Journal of Plant Protection, 39(1): 1-13. Wheat rust diseases, caused by Puccinia striiformis f. sp. tritici (stripe or yellow rust), P. triticina f. sp. tritici (leaf or brown rust) and P. graminis f. sp. tritici (stem or black rust) are important factors affecting both durum and bread wheat production in Syria. Considerable losses were caused by these diseases, especially stripe rust, estimated at more than one million metric tons, in the 2010 season, out of 5 million anticipated production. Therefore, it is essential to monitor and follow the movement of these three rust physiological races. In the 2019 growing season, 165 wheat fields were surveyed, and 312 samples were collected and characterized. Ten races of stripe rust were identified in ten locations, of which, four represent new record in Syria, namely the races 16E154, 69E150, 264E46 and 258E64. In addition, four races of leaf rust were identified in four locations, one of which (BKLP) is a new record in Syria. In addition, three previously recorded stem rust races were identified from three different locations. It should be mentioned that the newly recorded races of stripe rust are able to overcome resistance genes Yr1 and Yr5, on which the resistance of durum wheat cultivars such as "Cham3" depended, with a disease severity of 40S recorded in the same locations. It is also worth noting that the stripe rust race 462E128 (warrior) was not detected in the isolates studied. Likewise, the stem rust race Ug99 was also not identified, and because of the aggressiveness of this race, continuous inspection through field surveys accompanied with pathogenicity tests is essential during the coming seasons. Keywords: Stripe (yellow) rust, Leaf (brown) rust, stem (black) rust, race identification, wheat, Syria
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Zhang, Peipei, Xing Li, Takele-Weldu Gebrewahid, Hexing Liu, Xianchun Xia, Zhonghu He, Zaifeng Li, and Daqun Liu. "QTL Mapping of Adult-Plant Resistance to Leaf and Stripe Rust in Wheat Cross SW 8588/Thatcher using the Wheat 55K SNP Array." Plant Disease 103, no. 12 (December 2019): 3041–49. http://dx.doi.org/10.1094/pdis-02-19-0380-re.
Full textAbstract:
Wheat leaf rust (caused by Puccinia triticina) and stripe rust (caused by Puccinia striiformis f. sp. tritici) cause large production losses in many regions of the world. The objective of this study was to identify quantitative trait loci (QTL) for resistance to leaf rust and stripe rust in a recombinant inbred line population derived from a cross between wheat cultivars SW 8588 and Thatcher. The population and parents were genotyped with the Wheat 55K SNP Array and SSR markers and phenotyped for leaf rust severity at Zhoukou in Henan Province and Baoding in Hebei Province. Stripe rust responses were also evaluated at Chengdu in Sichuan Province, and at Baoding. Seven and six QTL were detected for resistance to leaf rust and stripe rust, respectively. Four QTL on chromosomes 1BL, 2AS, 5AL, and 7BL conferred resistance to both rusts. The QTL on 1BL and 2AS were identified as Lr46/Yr29 and Lr37/Yr17, respectively. QLr.hebau-2DS from Thatcher, identified as Lr22b that was previously thought to be ineffective in China, contributed a large effect for leaf rust resistance. QLr.hebau-5AL/QYr.hebau-5AL, QLr.hebau-3BL, QLr.hebau-6DS, QYr.hebau-4BS, and QYr.hebau-6DS are likely to be new QTL, but require further validation. Kompetitive allele-specific PCR (KASP) markers for QLr.hebau-2DS and QLr.hebau-5AL/QYr.hebau-5AL were successfully developed and validated in a diverse wheat panel from Sichuan Province, indicating their usefulness under different genetic backgrounds. These QTL and their closely linked SNP and SSR markers will be useful for fine mapping, candidate gene discovery, and marker-assisted selection in breeding for durable resistance to both leaf and stripe rusts.
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William, H. M., R. P. Singh, J. Huerta-Espino, G. Palacios, and K. Suenaga. "Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat." Genome 49, no. 8 (August 1, 2006): 977–90. http://dx.doi.org/10.1139/g06-052.
Full textAbstract:
Leaf (brown) and stripe (yellow) rusts, caused by Puccinia triticina and Puccinia striiformis, respectively, are fungal diseases of wheat (Triticum aestivum) that cause significant yield losses annually in many wheat-growing regions of the world. The objectives of our study were to characterize genetic loci associated with resistance to leaf and stripe rusts using molecular markers in a population derived from a cross between the rust-susceptible cultivar 'Avocet S' and the resistant cultivar 'Pavon76'. Using bulked segregant analysis and partial linkage mapping with AFLPs, SSRs and RFLPs, we identified 6 independent loci that contributed to slow rusting or adult plant resistance (APR) to the 2 rust diseases. Using marker information available from existing linkage maps, we have identified additional markers associated with resistance to these 2 diseases and established several linkage groups in the 'Avocet S' × 'Pavon76' population. The putative loci identified on chromosomes 1BL, 4BL, and 6AL influenced resistance to both stripe and leaf rust. The loci on chromosomes 3BS and 6BL had significant effects only on stripe rust, whereas another locus, characterized by AFLP markers, had minor effects on leaf rust only. Data derived from Interval mapping indicated that the loci identified explained 53% of the total phenotypic variation (R2) for stripe rust and 57% for leaf rust averaged across 3 sets of field data. A single chromosome recombinant line population segregating for chromosome 1B was used to map Lr46/Yr29 as a single Mendelian locus. Characterization of slow-rusting genes for leaf and stripe rust in improved wheat germplasm would enable wheat breeders to combine these additional loci with known slow-rusting loci to generate wheat cultivars with higher levels of slow-rusting resistance.Key words: Puccinia triticina, Puccinia striiformis, Triticum aestivum, bulked segregant analysis, single chromosome recombinant lines, linkage mapping, adult plant resistance.
7
Rioux, Sylvie, Benjamin Mimee, Annie-Ève Gagnon, and Sarah Hambleton. "First report of stripe rust (Puccinia striiformis f. sp. tritici) on wheat in Quebec, Canada." Communication brève 95, no. 1 (February 2, 2015): 7–9. http://dx.doi.org/10.7202/1028400ar.
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Stripe rust, Puccinia striiformis f. sp. tritici, is one of the world’s most important diseases of wheat. In Canada, stripe rust is found mainly in the western provinces (British Columbia, Alberta and Saskatchewan) and, more recently, in the provinces of Manitoba and Ontario. Here, we report the first detection of stripe rust on wheat in the province of Quebec, Canada. Leaves showing yellowish sporulation arranged in narrow stripes were found in wheat performance trials at the research station of Université Laval, in Saint-Augustin-de-Desmaures. Morphological identification was confirmed by several PCR assays targeting specific genomic sequences and a rDNA gene segment (ITS2/28S).
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William, M., R. P. Singh, J. Huerta-Espino, S. Ortiz Islas, and D. Hoisington. "Molecular Marker Mapping of Leaf Rust Resistance Gene Lr46 and Its Association with Stripe Rust Resistance Gene Yr29 in Wheat." Phytopathology® 93, no. 2 (February 2003): 153–59. http://dx.doi.org/10.1094/phyto.2003.93.2.153.
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Leaf and stripe rusts, caused by Puccinia triticina and P. striiformis, respectively, are globally important fungal diseases of wheat that cause significant annual yield losses. A gene that confers slow rusting resistance to leaf rust, designated as Lr46, has recently been located on wheat chromosome 1B. The objectives of our study were to establish the precise genomic location of gene Lr46 using molecular approaches and to determine if there was an association of this locus with adult plant resistance to stripe rust. A population of 146 F5 and F6 lines produced from the cross of susceptible ‘Avocet S’ with resistant ‘Pavon 76’ was developed and classified for leaf rust and stripe rust severity for three seasons. Using patterns of segregation for the two diseases, we estimated that at least two genes with additive effects conferred resistance to leaf rust and three to four genes conferred resistance to stripe rust. Bulked segregant analysis and linkage mapping using amplified fragment length polymorphisms with the ‘Avocet’ × ‘Pavon 76’ population, F3 progeny lines of a single chromosome recombinant line population from the cross ‘Lalbahadur’ × ‘Lalbahadur (Pavon 1B)’, and the International Triticeae Mapping Initiative population established the genomic location of Lr46 at the distal end of the long arm of wheat chromosome 1B. A gene that is closely linked to Lr46 and confers moderate levels of adult plant resistance to stripe rust is identified and designated as Yr29.
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Suenaga, K., R. P. Singh, J. Huerta-Espino, and H. M. William. "Microsatellite Markers for Genes Lr34/Yr18 and Other Quantitative Trait Loci for Leaf Rust and Stripe Rust Resistance in Bread Wheat." Phytopathology® 93, no. 7 (July 2003): 881–90. http://dx.doi.org/10.1094/phyto.2003.93.7.881.
Full textAbstract:
Leaf rust and stripe rust, caused by Puccinia triticina and P. striiformis, respectively, are important diseases of wheat in many countries. In this study we sought to identify molecular markers for adult plant resistance genes that could aid in incorporating such durable resistance into wheat. We used a doubled haploid population from a Japanese cv. Fukuho-komugi × Israeli wheat Oligoculm cross that had segregated for resistance to leaf rust and stripe rust in field trials. Joint and/or single-year analyses by composite interval mapping identified two quantitative trait loci (QTL) that reduced leaf rust severity and up to 11 and 7 QTLs that might have influenced stripe rust severity and infection type, respectively. Four common QTLs reduced stripe rust severity and infection type. Except for a QTL on chromosome 7DS, no common QTL for leaf rust and stripe rust was detected. QTL-7DS derived from ‘Fukuho-komugi’ had the largest effect on both leaf rust and stripe rust severities, possibly due to linked resistance genes Lr34/Yr18. The microsatellite locus Xgwm295.1, located almost at the peak of the likelihood ratio contours for both leaf and stripe rust severity, was closest to Lr34/Yr18. QTLs located on 1BL for leaf rust severity and 3BS for stripe rust infection type were derived from ‘Oligoculm’ and considered to be due to genes Lr46 and Yr30, respectively. Most of the remaining QTLs for stripe rust severity or infection type had smaller effects. Our results indicate there is significant diversity for genes that have minor effects on stripe rust resistance, and that successful detection of these QTLs by molecular markers should be helpful both for characterizing wheat genotypes effectively and combining such resistance genes.
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KHANFRI, Siham, Mohammed BOULIF, and Rachid LAHLALI. "Yellow Rust (Puccinia striiformis): a Serious Threat to Wheat Production Worldwide." Notulae Scientia Biologicae 10, no. 3 (September 27, 2018): 410–23. http://dx.doi.org/10.15835/nsb10310287.
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Wheat (Triticum sp. L.), as one of the first domesticated food crops, is the basic staple food for a large segment of population around the world. The crop though is susceptible to many fungal pathogens. Stripe rust is an important airborne disease caused by Puccinia striiformis (Pst) and is widespread wherever wheat is cultivated throughout the world, in temperate-cool and wet environments. The causal fungus of stripe rust or yellow rust is an obligate parasite that requires another living host to complete its life cycle. Pst includes five types of spores in the life cycle on two distinct hosts. Stripe rust is distinguished from other rusts by the dusty yellow lesions that grow systemically in the form of streaks between veins and on leaf sheaths. The importance and occurrence of stripe rust disease varies in cultivated wheat, depending on environmental conditions (moisture, temperature, and wind), inoculum levels and susceptible host varieties. Transcaucasia was previously thought to be the center of origin for the pathogen. However, new findings further underlined Himalayan and near-Himalayan regions as center of diversity and a more tenable center of origin for P. striiformis. Long-distance dispersal of stripe rust pathogen in the air and occasionally by human activities enables Pst to spread to new geographical areas. This disease affects quality and yield of wheat crop. Early seeding, foliar fungicide application and cultivation of resistant varieties are the main strategies for its control. The emergence of new races of Pst with high epidemic potential which can adapt to warmer temperatures has expanded virulence profiles. Subsequently, races are more aggressive than those previously characterized. These findings emphasize the need for more breeding efforts of resistant varieties and reinforcement of other management practices to prevent and overcome stripe rust epidemic around the world.
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Grabow, B. S., D. A. Shah, and E. D. DeWolf. "Environmental Conditions Associated with Stripe Rust in Kansas Winter Wheat." Plant Disease 100, no. 11 (November 2016): 2306–12. http://dx.doi.org/10.1094/pdis-11-15-1321-re.
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Stripe rust has reemerged as a problematic disease in Kansas wheat. However, there are no stripe rust forecasting models specific to Kansas wheat production. Our objective was to identify environmental variables associated with stripe rust epidemics in Kansas winter wheat as an initial step in the longer-term goal of developing predictive models for stripe rust to be used within the state. Mean yield loss due to stripe rust on susceptible varieties was estimated from 1999 to 2012 for each of the nine Kansas crop reporting districts (CRD). A CRD was classified as having experienced a stripe rust epidemic when yield loss due to the disease equaled or exceeded 1%, and a nonepidemic otherwise. Epidemics were further classified as having been moderate or severe if yield loss was 1 to 14% or greater than 14%, respectively. The binary epidemic categorizations were linked to a matrix of 847 variables representing monthly meteorological and soil moisture conditions. Classification trees were used to select variables associated with stripe rust epidemic occurrence and severity (conditional on an epidemic having occurred). Selected variables were evaluated as predictors of stripe rust epidemics within a general estimation equations framework. The occurrence of epidemics within CRD was linked to soil moisture during the fall and winter months. In the spring, severe epidemics were linked to optimal (7 to 12°C) temperatures. Simple environmentally based stripe rust models at the CRD level may be combined with field-level disease observations and an understanding of varietal reaction to stripe rust as part of an operational disease forecasting system in Kansas.
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Bhardwaj, Subhash C., Gyanendra P. Singh, Om P. Gangwar, Pramod Prasad, and Subodh Kumar. "Status of Wheat Rust Research and Progress in Rust Management-Indian Context." Agronomy 9, no. 12 (December 16, 2019): 892. http://dx.doi.org/10.3390/agronomy9120892.
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The rusts of wheat, caused by three species of Puccinia, are very devastating diseases and are major biotic constraints in efforts to sustain wheat production worldwide. Their capacity to spread aerially over long distances, rapid production of infectious uredospores, and abilities to evolve new pathotypes, makes the management of wheat pathogens a very challenging task. The development and deployment of resistant wheat varieties has proven to be the most economic, effective and efficient means of managing rust diseases. Rust resistance used in wheat improvement has included sources from the primary gene pool as well as from species distantly related to wheat. The 1BL/1RS translocation from cereal rye was used widely in wheat breeding, and for some time provided resistance to the wheat leaf rust, stripe rust, and stem rust pathogens conferred by genes Lr26, Yr9, and Sr31, respectively. However, the emergence of virulence for all three genes, and stripe rust resistance gene Yr27, has posed major threats to the cultivation of wheat globally. To overcome this threat, efforts are going on worldwide to monitor rust diseases, identify rust pathotypes, and to evaluate wheat germplasm for rust resistance. Anticipatory breeding and the responsible deployment of rust resistant cultivars have proven to be effective strategies to manage wheat rusts. Efforts are still however being made to decipher the recurrence of wheat rusts, their epidemiologies, and new genomic approaches are being used to break the yield barriers and manage biotic stresses such as the rusts. Efficient monitoring of pathotypes of Puccinia species on wheat, identification of resistance sources, pre-emptive breeding, and strategic deployment of rust resistant wheat cultivars have been the key factors to effective management of wheat rusts in India. The success in containing wheat rusts in India can be gauged by the fact that we had no wheat rust epiphytotic for nearly last five decades. This publication provides a comprehensive overview of the wheat rust research conducted in India.
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Grover, Gomti, Achla Sharma, Ian Mackay, Puja Srivastava, Satinder Kaur, Jaspal Kaur, Amanda Burridge, et al. "Identification of a novel stripe rust resistance gene from the European winter wheat cultivar ‘Acienda’: A step towards rust proofing wheat cultivation." PLOS ONE 17, no. 2 (February 16, 2022): e0264027. http://dx.doi.org/10.1371/journal.pone.0264027.
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All stage resistance to stripe rust races prevalent in India was investigated in the European winter wheat cultivar ‘Acienda’. In order to dissect the genetic basis of the resistance, a backcross population was developed between ‘Acienda’ and the stripe rust susceptible Indian spring wheat cultivar ‘HD 2967’. Inheritance studies revealed segregation for a dominant resistant gene. High density SNP genotyping was used to map stripe rust resistance and marker regression analysis located stripe rust resistance to the distal end of wheat chromosome 1A. Interval mapping located this region between the SNP markers AX-95162217 and AX-94540853, at a LOD score of 15.83 with a phenotypic contribution of 60%. This major stripe rust resistance locus from ‘Acienda’ has been temporarily designated as Yraci. A candidate gene search in the 2.76 Mb region carrying Yraci on chromosome 1A identified 18 NBS-LRR genes based on wheat RefSeqv1.0 annotations. Our results indicate that as there is no major gene reported in the Yraci chromosome region, it is likely to be a novel stripe rust resistance locus and offers potential for deployment, using the identified markers, to confer all stage stripe rust resistance.
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Rosa, Silvia B., Brent McCallum, Anita Brûlé-Babel, Colin Hiebert, Stephen Shorter, Harpinder S. Randhawa, and Amarilis L. Barcellos. "Inheritance of Leaf Rust and Stripe Rust Resistance in the Brazilian Wheat Cultivar ‘Toropi’." Plant Disease 100, no. 6 (June 2016): 1132–37. http://dx.doi.org/10.1094/pdis-10-15-1128-re.
Full textAbstract:
Leaf rust (Puccinia triticina) and stripe rust (P. striiformis f. tritici) affect wheat production worldwide. Brazilian ‘Toropi’ wheat has demonstrated durable leaf rust resistance in South America since its release in 1965. It was previously found to have up to two adult plant leaf rust resistance genes. The leaf and stripe rust resistance of Toropi were studied by analyzing a doubled-haploid population made by crossing with susceptible ‘Thatcher’. Toropi expressed good resistance to leaf rust in Canada, Brazil, and New Zealand. Based on field and greenhouse testing, the leaf rust resistance of Toropi is conferred by two race-nonspecific complementary adult plant genes and a race-specific adult plant gene. The stripe rust resistance of Toropi analyzed in New Zealand and in Canada is based on up to two resistance genes. Toropi should provide an important contribution to rust resistance because it expressed good leaf rust and stripe rust resistance in different parts of the world.
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Chen, X. M. "Challenges and solutions for stripe rust control in the United States." Australian Journal of Agricultural Research 58, no. 6 (2007): 648. http://dx.doi.org/10.1071/ar07045.
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Stripe rust of wheat, caused by Puccinia striiformis f. sp. tritici, has been one of the most destructive diseases on wheat in the western USA since the late 1950s and has become increasingly important in the central and south-eastern USA since 2000. Stripe rust of barley, caused by P. striiformis f. sp. hordei, a relatively new disease, has established and caused severe damage in the south-central and western states since the pathogen was first reported in Texas in 1991. Stripe rusts of wheat and barley have been monitored by trap nurseries and by field surveys. Collections of stripe rust from wheat, barley, triticale, and grasses have been tested on a set of 20 wheat differential genotypes for identifying races of P. striiformis f. sp. tritici and a set of 12 barley differential genotypes for identifying races of P. striiformis f. sp. hordei. In total, 62 new races of P. striiformis f. sp. tritici and 22 new races of P. striiformis f. sp. hordei have been identified since 2000. Germplasm and breeding lines of wheat and barley have been tested every year under natural infection in the field and with selected races in the greenhouse. Combinations of durable high-temperature, adult-plant resistance with effective all-stage resistance should provide more effective stripe rust control and reduce the use of fungicides.
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Talajoor, Mina, Yue Jin, Anmin Wan, Xianming Chen, Sridhar Bhavani, Linda Tabe, Evans Lagudah, and Li Huang. "Specificity of a Rust Resistance Suppressor on 7DL in the Spring Wheat Cultivar Canthatch." Phytopathology® 105, no. 4 (April 2015): 477–81. http://dx.doi.org/10.1094/phyto-09-14-0261-r.
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The spring wheat ‘Canthatch’ has been shown to suppress stem rust resistance genes in the background due to the presence of a suppressor gene located on the long arm of chromosome 7D. However, it is unclear whether the suppressor also suppresses resistance genes against leaf rust and stripe rust. In this study, we investigated the specificity of the resistance suppression. To determine whether the suppression is genome origin specific, chromosome location specific, or rust species or race specific, we introduced 11 known rust resistance genes into the Canthatch background, including resistance to leaf, stripe, or stem rusts, originating from A, B, or D genomes and located on different chromosome homologous groups. F1 plants of each cross were tested with the corresponding rust race, and the infection types were scored and compared with the parents. Our results show that the Canthatch 7DL suppressor only suppressed stem rust resistance genes derived from either the A or B genome, and the pattern of the suppression is gene specific and independent of chromosomal location.
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Wan, A. M., X. M. Chen, and Z. H. He. "Wheat stripe rust in China." Australian Journal of Agricultural Research 58, no. 6 (2007): 605. http://dx.doi.org/10.1071/ar06142.
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China has the largest stripe rust epidemic region in the world in terms of wheat acreage affected by the disease. Extensive studies on the epidemiology and management of stripe rust have been carried out since the widespread occurrence of the disease in the 1950s. Fifteen epidemic zones were classified, based on factors influencing the occurrence of wheat stripe rust. The disease can spread inter-regionally, mainly from west to east and from south to north. Winter-wheat growing regions in the north-west, south-west, and north, and spring-wheat growing regions in the north-west are the major epidemic areas. Hotspots of wheat stripe rust are mainly located in south-eastern Gansu and north-western Sichuan, and these areas constitute the inoculum base, centre of diversity, and major over-summering areas of the pathogen. Successful control in over-summering areas is the key to achieving sustainable management of stripe rust in China. Pathogen variability and race virulence have been monitored continuously, and the resistance genetics and background of Chinese wheat cultivars analysed. Effective management of stripe rust includes resistance breeding and application, diversification and deployment of various resistance genes, use of chemicals, adoption of appropriate agricultural practice, and integrated disease management in ‘hotspot’ regions. Collaboration of scientists among various organisations and disciplines is vital. We discuss the progress and challenges of wheat stripe rust management in China.
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Blount, Ann R., Shabbir A. Rizvi, Ronald D. Barnett, Xianming Chen, Timothy S. Schubert, W. Hank Dankers, Timur M. Momol, and Wayne N. Dixon. "First Report of Stripe Rust caused by Puccinia striiformis f. sp. tritici on Wheat in Florida." Plant Health Progress 6, no. 1 (January 2005): 32. http://dx.doi.org/10.1094/php-2005-0304-01-hn.
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The wheat stripe rust pathogen occured on several experimental wheat lines planted at Quincy, FL in early February 2003. Several experimental lines in the 2003 Advanced Wheat A, the Advanced Wheat B, and the Uniform Southern Wheat Nursery yield trials then showed traces of stripe rust on the leaves of the plants. An unusually cool and wet winter and spring encouraged a scattered outbreak of stripe rust of wheat on susceptible experimental lines of wheat. This report constitutes the first documented case of stripe rust of wheat in Florida. Accepted for publication 22 February 2005. Published 4 March 2005.
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Amgai, Resham B., Shreejan Pokharel, Sumitra Pantha, Atit Parajuli, Sudeep Subedi, and Shambhu P. Dhital. "Selection of Pyramided Barley Advanced Lines for Stripe Rust, Leaf Rust and Crown Rust Diseases Using Molecular Markers." Nepal Journal of Biotechnology 8, no. 3 (December 30, 2020): 111–15. http://dx.doi.org/10.3126/njb.v8i3.33665.
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Barley diseases are the major yield limiting factors for barley cultivation in Nepal. Stripe/Yellow rust (P. striformis f.sp. hordei and P. striformis f.sp. tritici), leaf rust (Puccinia hordei), and crown rust (P. coronata) are the major rust diseases in Nepal. Pyramiding resistance genes against all these rust diseases are possible through molecular marker assisted breeding. Sweden originated barley variety ‘Bonus’ is found resistant to stripe rust and having linked microsatellite markers for stripe rust and crown rust resistance. Similarly, Nepalese hull-less barley variety ‘Solu Uwa’ and Nepalese awn-less barley landrace NPGR Acc# 2478 have linked microsatellite markers for leaf rust resistance. Therefore, one polymorphic sequence tagged sites (STS) marker (ABG054) for stripe rust resistance, two polymorphic simple sequence repeats (SSR) markers (Bmac0144h and HVM049) for leaf rust and one polymorphic SSR marker (Bmag0006) for crown rust resistance were used to select the advanced barley lines (at F8 stage) from above parents. Field screening of stripe rust resistance was also conducted. Among 51 advanced and field disease resistance lines from Bonus/Solu Uwa cross, we have selected 10 pyramided lines for all three types of barley rust resistance. Similarly, among 39 advanced and field disease resistance lines from Bonus/NPGR Acc#2478 cross we have selected three pyramided lines and advanced for further yield testing for general cultivation purpose. The chances of losing the desired gene are high in late generation selection using molecular marker assisted selection (MAS); but the chances of getting agronomically superior varietal output will also increase.
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Bai, B., J. Y. Du, Q. L. Lu, C. Y. He, L. J. Zhang, G. Zhou, X. C. Xia, Z. H. He, and C. S. Wang. "Effective Resistance to Wheat Stripe Rust in a Region with High Disease Pressure." Plant Disease 98, no. 7 (July 2014): 891–97. http://dx.doi.org/10.1094/pdis-09-13-0909-re.
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Stripe rust is a major fungal disease of wheat. It frequently becomes epidemic in southeastern Gansu province, a stripe rust hot spot in China. Evaluations of wheat germplasm response are crucial for developing cultivars to control the disease. In total, 57 wheat cultivars and lines from Europe and other countries, comprising 36 cultivars with documented stripe rust resistance genes and 21 with unknown genes, were tested annually with multiple races of Puccinia striiformis f. sp. tritici in the field at Tianshui in Gansu province from 1993 to 2013. Seven wheat lines were highly resistant, with infection type (IT) 0 during the entire period; 16 were moderately resistant (IT 0;-2); and 26 were moderately susceptible (IT 0;-4), with low maximum disease severity compared with the susceptible control Huixianhong. ‘Strampelli’ and ‘Libellula’, with three and five quantitative trait loci, respectively, for stripe rust resistance have displayed durable resistance in this region for four decades. Ten cultivars, including ‘Lantian 15’, ‘Lantian 26’, and ‘Lantian 31’, with stripe rust resistance derived from European lines, were developed in our breeding program and have made a significant impact on controlling stripe rust in southeastern Gansu. Breeding resistant cultivars with multiple adult-plant resistance genes seems to be a promising strategy in wheat breeding for managing stripe rust in this region and other hot spots.
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Gessese, Mesfin Kebede. "Description of Wheat Rusts and Their Virulence Variations Determined through Annual Pathotype Surveys and Controlled Multi-Pathotype Tests." Advances in Agriculture 2019 (December 6, 2019): 1–7. http://dx.doi.org/10.1155/2019/2673706.
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Wheat production started in Australia around 1788 using early maturing varieties adapted to Australian conditions that were able to escape diseases as well as moisture stress conditions. Wheat production is concentrated on mainland Australia in a narrow crescent land considered as the wheat belt occupying an area of about 13.9 million hectares. Rusts are the most important production constraints to wheat production in the world and Australia causing significant yield losses and decreased the qualities of grains. Wheat is affected by three different types of rust diseases: leaf rust, stripe rust or yellow rust, and stem rust. Each species of the rust pathogen has many races or pathotypes that parasitize only on certain varieties of host species, which can only be traced and identified by differential cultivars. Pathotype surveillance is the basis for information on the virulence or pathogenic variations existing in a particular country or wheat growing region of the world. Studies in pathotype variation are conducted in controlled environments using multi-pathotype tests. The currently cultivated commercial wheat varieties of Australia possess leaf rust resistant genes: Lr1, Lr3a, Lr13, Lr13+, Lr14a, Lr17a, Lr17b, Lr20, Lr23, Lr24, Lr26, Lr27, Lr31, Lr34, Lr37, and Lr46; stem rust resistance genes: Sr2, Sr5, Sr8a, Sr8b, Sr9b, Sr9g, Sr11, Sr12, Sr13, Sr15, Sr17, Sr22, Sr24, Sr26, Sr30, Sr36, Sr38, and Sr57; and stripe rust resistance genes: Yr4, Yr9, Yr17, Yr18, Yr27, and Yr33. This paper discusses the historical and current significance of rusts to wheat production in the world with particular reference to Australia viz-a-viz detail description of each of the three rusts and their respective virulence variations through the resistance genes deployed in the commercial cultivars.
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Milus, Eugene A., David E. Moon, Kevin D. Lee, and R. Esten Mason. "Race-Specific Adult-Plant Resistance in Winter Wheat to Stripe Rust and Characterization of Pathogen Virulence Patterns." Phytopathology® 105, no. 8 (August 2015): 1114–22. http://dx.doi.org/10.1094/phyto-11-14-0305-r.
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Stripe rust, caused by Puccinia striiformis f. sp. tritici, is an important disease of wheat in the Great Plains and southeastern United States. Growing resistant cultivars is the preferred means for managing stripe rust, but new virulence in the pathogen population overcomes some of the resistance. The objectives of this study were to characterize the stripe rust resistance in contemporary soft and hard red winter wheat cultivars, to characterize the virulence of P. striiformis f. sp. tritici isolates based on the resistances found in the cultivars, and to determine wheat breeders’ perceptions on the importance and methods for achieving stripe rust resistance. Seedlings of cultivars were susceptible to recent isolates, indicating they lacked effective all-stage resistance. However, adult-plants were resistant or susceptible depending on the isolate, indicating they had race-specific adult-plant resistance. Using isolates collected from 1990 to 2013, six major virulence patterns were identified on adult plants of twelve cultivars that were selected as adult-plant differentials. Race-specific adult-plant resistance appears to be the only effective type of resistance protecting wheat from stripe rust in eastern United States. Among wheat breeders, the importance of incorporating stripe rust resistance into cultivars ranged from high to low depending on the frequency of epidemics in their region, and most sources of stripe rust resistance were either unknown or already overcome by virulence in the pathogen population. Breeders with a high priority for stripe rust resistance made most of their selections based on adult-plant reactions in the field, whereas breeders with a low priority for resistance based selections on molecular markers for major all-stage resistance genes.
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Pang, Yunlong, Chunxia Liu, Meng Lin, Fei Ni, Wenhui Li, Jin Cai, Ziliang Zhang, et al. "Mapping QTL for Adult-Plant Resistance to Stripe Rust in a Chinese Wheat Landrace." International Journal of Molecular Sciences 23, no. 17 (August 26, 2022): 9662. http://dx.doi.org/10.3390/ijms23179662.
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Wheat stripe (yellow) rust is a worldwide disease that seriously reduces wheat grain yield and quality. Adult-plant resistance (APR) to stripe rust is generally more durable but usually controlled by multiple genes with partial resistance. In this study, a recombinant inbred line population was developed from a cross between a Chinese wheat landrace, Tutoumai, with APR to stripe rust, and a highly susceptible wheat cultivar, Siyang 936. The population was genotyped by genotyping-by-sequencing and phenotyped for APR to stripe rust in four consecutive field experiments. Three QTLs, QYr.sdau-1BL, QYr.sdau-5BL, and QYr.sdau-6BL, were identified for APR to stripe rust, and explained 8.0–21.2%, 10.1–22.7%, and 11.6–18.0% of the phenotypic variation, respectively. QYr.sdau-1BL was further mapped to a 21.6 Mb region using KASP markers derived from SNPs identified by RNA-seq of the two parents. In the QYr.sdau-1BL region, 13 disease-resistance-related genes were differently expressed between the two parents, and therefore were considered as the putative candidates of QYr.sdau-1BL. This study provides favorable gene/QTL and high-throughput markers to breeding programs for marker-assisted selection of the wheat stripe rust APR genes.
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Liu, Tao, George Fedak, Lianquan Zhang, Rangrang Zhou, Dawn Chi, Tom Fetch, Colin Hiebert, et al. "Molecular Marker Based Design for Breeding Wheat Lines with Multiple Resistance and Superior Quality." Plant Disease 104, no. 10 (October 2020): 2658–64. http://dx.doi.org/10.1094/pdis-02-20-0420-re.
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There has not been a major wheat stem rust epidemic worldwide since the 1970s, but the emergence of race TTKSK of Puccinia graminis f. sp. tritici in 1998 presented a great threat to the world wheat production. Single disease-resistance genes are usually effective for only several years before the pathogen changes genetically to overcome the resistance. Stripe rust caused by Puccinia striiformis f. sp. tritici (Pst) is one of the most common and persistent wheat diseases worldwide. The development of varieties with multiple resistance is the most economical and effective strategy for preventing stripe rust and stem rust, the two main rust diseases constraining wheat production. Plateau 448 has been widely used in the spring wheat growing region in northwest China, but it has become susceptible to stripe rust and is susceptible to TTKSK. To produce more durable resistance to race TTKSK as well as to stripe rust, four stem rust resistance genes (Sr33, Sr36, Sr-Cad, and Sr43) and three stripe rust resistance genes (Yr5, Yr18, and Yr26) were simultaneously introgressed into Plateau 448 to improve its stem rust (Ug99) and stripe rust resistance using a marker-assisted backcrossing strategy combined with phenotypic selection. We obtained 131 BC1F5 lines that pyramided two to four Ug99 resistance genes and one to two Pst resistance genes simultaneously. Thirteen of these lines were selected for their TTKSK resistance, and all of them exhibited near immunity or high resistance to TTKSK. Among the 131 pyramided lines, 95 showed high resistance to mixed Pst races. Nine lines exhibited not only high resistance to TTKSK and Pst but also better agronomic traits and high-molecular-weight glutenin subunit compositions than Plateau 448.
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Meyer, M., N. Bacha, T. Tesfaye, Y. Alemayehu, E. Abera, B. Hundie, G. Woldeab, et al. "Wheat rust epidemics damage Ethiopian wheat production: A decade of field disease surveillance reveals national-scale trends in past outbreaks." PLOS ONE 16, no. 2 (February 3, 2021): e0245697. http://dx.doi.org/10.1371/journal.pone.0245697.
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Wheat rusts are the key biological constraint to wheat production in Ethiopia—one of Africa’s largest wheat producing countries. The fungal diseases cause economic losses and threaten livelihoods of smallholder farmers. While it is known that wheat rust epidemics have occurred in Ethiopia, to date no systematic long-term analysis of past outbreaks has been available. We present results from one of the most comprehensive surveillance campaigns of wheat rusts in Africa. More than 13,000 fields have been surveyed during the last 13 years. Using a combination of spatial data-analysis and visualization, statistical tools, and empirical modelling, we identify trends in the distribution of wheat stem rust (Sr), stripe rust (Yr) and leaf rust (Lr). Results show very high infection levels (mean incidence for Yr: 44%; Sr: 34%; Lr: 18%). These recurrent rust outbreaks lead to substantial economic losses, which we estimate to be of the order of 10s of millions of US-D annually. On the widely adopted wheat variety, Digalu, there is a marked increase in disease prevalence following the incursion of new rust races into Ethiopia, which indicates a pronounced boom-and-bust cycle of major gene resistance. Using spatial analyses, we identify hotspots of disease risk for all three rusts, show a linear correlation between altitude and disease prevalence, and find a pronounced north-south trend in stem rust prevalence. Temporal analyses show a sigmoidal increase in disease levels during the wheat season and strong inter-annual variations. While a simple logistic curve performs satisfactorily in predicting stem rust in some years, it cannot account for the complex outbreak patterns in other years and fails to predict the occurrence of stripe and leaf rust. The empirical insights into wheat rust epidemiology in Ethiopia presented here provide a basis for improving future surveillance and to inform the development of mechanistic models to predict disease spread.
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Yan, Xiaocui, Huimin Zheng, Peipei Zhang, Gebrewahid Takele Weldu, Zaifeng Li, and Daqun Liu. "QTL mapping of adult plant resistance to stripe rust in the Fundulea 900 × Thatcher RIL population." Czech Journal of Genetics and Plant Breeding 57, No. 1 (January 7, 2021): 1–8. http://dx.doi.org/10.17221/71/2020-cjgpb.
Full textAbstract:
Wheat stripe rust, caused by Puccinia striiformis Westend. f.sp. tritici Eriks (Pst), is one of the most important diseases of bread wheat worldwide. Breeding resistant wheat cultivars is the most economical, effective and environmentally friendly way for controlling wheat stripe rust in China. The Romanian wheat line Fundulea 900 showed good resistance to wheat stripe rust at the adult stage. The present study aimed to map the quantitative trait loci (QTLs) for stripe rust resistance in 176 F<sub>2:6</sub> recombinant inbred lines (RIL) derived from the cross of Fundulea 900 × Thatcher. The RIL population was phenotyped for stripe rust (YR) severity at Mianyang in the Sichuan province and Baoding in the Hebei province in the 2016/2017 and 2017/2018 cropping seasons. SSR markers combined with a preferred screened group (PSG) analysis were used to identify the QTLs for stripe rust in the population. Three QTLs for stripe rust resistance were mapped on chromosomes 1AL, 7BL and 7DS, respectively. All three QTLs originated from Fundulea 900 and were detected in all the environments. The QTL on 7DS was provided by the known resistance gene Yr18/Lr34. The two QTLs on chromosomes 1AL and 7BL were explained by 9.2 to 21.5% and 5.1 to 10.1% of the phenotypic variance, respectively and might be new QTLs. The QTLs identified in the study and their closely linked markers can be used for marker-assisted selection (MAS) in wheat breeding programmes.
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Chen, Q., R. L. Conner, H. Li, A. Laroche, R. J. Graf, and A. D. Kuzyk. "Expression of resistance to stripe rust, powdery mildew and the wheat curl mite in Triticum aestivum × Haynaldia villosalines." Canadian Journal of Plant Science 82, no. 2 (April 1, 2002): 451–56. http://dx.doi.org/10.4141/p01-062.
Full textAbstract:
Stripe rust, powdery mildew and the wheat curl mite (Aceria tosichella) (WCM) are common problems in wheat throughout the world. The expression of resistance to these diseases and the mite was investigated in wheat ×Haynaldia villosa chromosome addition, substitution and translocation lines. Progeny tests and cytogenetic examinations were carried out on crosses of the 6VS translocation line with susceptible genotypes of wheat to study the inheritance of the stripe rust, powdery mildew and WCM resistance. These studies also were used to elucidate if the resistance was associated with the H. villosa 6V chromosome. The test results confirmed the presence of a high level of resistance to stripe rust in wheat × H. villosa 6V addition and 6VS translocation lines. However, progeny tests and genomic in situ hybridization (GISH) analysis showed that the stripe rust resistance gene, Yr26 was not associated with the H. villosa chromosome arm 6VS. While WCM and powdery mildew resistance were always associated with the presence of the 6VS chromosome arm in the F2 and F3 populations. The study also showed that most wheat × H. villosa addition or substitution lines were heterogenous in their reaction to stripe rust. The possible reasons for the heterogeneous response to stripe rust in wheat lines carrying the H. villosa chromosomes 2V, 3V and 4V are discussed. Key words: Haynaldia villosa, Puccinia striformis, Aceria tosichella, stripe rust, expression of resistance, addition lines, substitution lines, 6VS-translocation
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Hernandez, Javier, Alicia del Blanco, Tanya Filichkin, Scott Fisk, Lynn Gallagher, Laura Helgerson, Brigid Meints, Chris Mundt, Brian Steffenson, and Patrick Hayes. "A Genome-Wide Association Study of Resistance to Puccinia striiformis f. sp. hordei and P. graminis f. sp. tritici in Barley and Development of Resistant Germplasm." Phytopathology® 110, no. 5 (May 2020): 1082–92. http://dx.doi.org/10.1094/phyto-11-19-0415-r.
Full textAbstract:
Stripe rust (incited by Puccinia striiformis f. sp. hordei) and stem rust (incited by P. graminis f. sp. tritici) are two of the most important diseases affecting barley. Building on prior work involving the introgression of the resistance genes rpg4/Rpg5 into diverse genetic backgrounds and the discovery of additional quantitative trait locus (QTLs) for stem rust resistance, we generated an array of germplasm in which we mapped resistance to stripe rust and stem rust. Stem rust races TTKSK and QCCJB were used for resistance mapping at the seedling and adult plant stages, respectively. Resistance to stripe rust, at the adult plant stage, was determined by QTLs on chromosomes 1H, 4H, and 5H that were previously reported in the literature. The rpg4/Rpg5 complex was validated as a source of resistance to stem rust at the seedling stage. Some parental germplasm, selected as potentially resistant to stem rust or susceptible but having other positive attributes, showed resistance at the seedling stage, which appears to be allelic to rpg4/Rpg5. The rpg4/Rpg5 complex, and this new allele, were not sufficient for adult plant resistance to stem rust in one environment. A QTL on 5H, distinct from Rpg5 and a previously reported resistance QTL, was required for resistance at the adult plant stage in all environments. This QTL is coincident with the QTL for stripe rust resistance. Germplasm with mapped genes/QTLs conferring resistance to stripe and stem rust was identified and is available as a resource to the research and breeding communities.
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Viljanen-Rollinson, S. L. H., M. V. Marroni, and R. C. Butler. "Benefits from plant resistance in reducing reliance on fungicides in cereal disease management." New Zealand Plant Protection 63 (August 1, 2010): 145–50. http://dx.doi.org/10.30843/nzpp.2010.63.6556.
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Two field trials autumn and springsown with seven fungicide treatments and three wheat cultivars with different levels of resistance to Puccinia striiformis the cause of stripe rust were carried out at Lincoln during the 20092010 growing season to assess the value of utilising disease resistance within an integrated wheat disease management strategy The development of stripe rust was monitored during the season The resistant cultivar CFR02452 was free of stripe rust in all treatments including the no fungicide treatment There was more disease in the autumnsown trial than in the springsown trial The moderately resistant cultivar Torlesse had less stripe rust than the susceptible cultivar Claire in both trials and negligible disease in the springsown trial In cultivar Claire for both trials two fungicide applications that started before disease was present provided disease control that was similar to four applications but fungicide applications that commenced once the disease had established provided little control of stripe rust
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Luo, Pei-Gao, Xue-Yun Hu, Zhi-Jian Chang, Min Zhang, Huai-Qiong Zhang, and Zheng-Long Ren. "A new stripe rust resistance gene transferred from Thinopyrum intermedium to hexaploid wheat (Triticum aestivum)." Phytoprotection 90, no. 2 (June 28, 2010): 57–63. http://dx.doi.org/10.7202/044023ar.
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Wheat stripe rust (Puccinia striiforis f. sp. tritici) races CYR31 and CYR32, prevalent in China, are virulent to many wheat stripe rust resistance genes (Yr genes). To expand the availability of effective resistance to CYR31 and CYR32, stripe rust resistance was transferred from intermediate wheatgrass (Thinopyrum intermedium) to common wheat (Triticum aestivum). The susceptible wheat cultivar CM107 was crossed with amphiploid TAI7047, derived from the wide cross Taiyuan768/Thinopyrum intermedium//76(64). Two wheat lines originating from the cross, YU24 and YU25, were resistant to CYR31 and CYR32. Pedigree analysis showed that the resistance to stripe rust in YU24 and YU25 originated from intermediate wheatgrass. Genetic analyses indicated that the resistance to stripe rust is controlled by a single dominant gene. Allelic tests determined that the resistance gene(s) in YU24 and YU25 are identical. The new gene has temporarily been designated as YrYU25. SSR and RAPD analyses showed that YrYU25 was introduced by cryptic translocation into common wheat.
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Bariana, H. S., M. J. Hayden, N. U. Ahmed, J. A. Bell, P. J. Sharp, and R. A. McIntosh. "Mapping of durable adult plant and seedling resistances to stripe rust and stem rust diseases in wheat." Australian Journal of Agricultural Research 52, no. 12 (2001): 1247. http://dx.doi.org/10.1071/ar01040.
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Doubled haploid populations of CD87/Katepwa, Cranbrook/Halberd, and Sunco/Tasman were assessed for seedling response to stem rust and stripe rust. The CD87/Katepwa population was also screened as adult plants in the field against stripe rust. The respective parents differed in presence or absence of various stem rust and stripe rust resistance genes. At least 4 resistance loci controlled adult plant resistance to stripe rust in the CD87/Katepwa population, and based on quantitative trait loci mapping results, two of these were contributed by CD87. Pedigree information indicated that these regions correspond to durable adult plant stripe rust resistance genes Yr18 and Yr29. Yr29 was mapped to the distal region of chromosome 1BL. The third gene, contributed by Katepwa, YrKat, was located in chromosome arm 2DS. Sr30 mapped distal to markers abg3 and P36/M61-170 in chromosome arm 5DL. Genes Yr7 and Pbc (completely linked with durable stem rust resistance gene Sr2) showed close associations with markers in chromosome arms 2BL and 3BS, respectively. A distally located genomic region in chromosome 6AS also affected the expression of Pbc. The temperature-sensitive stripe rust resistance gene, YrCK, carried by Sunco showed monogenic inheritance and was located in chromosome arm 2DS. Several markers showed complete association with Triticum timopheevi derived stem rust resistance gene Sr36. Microsatellite markers stm773 and gwm271A were validated on a set of wheat genotypes and were found to be diagnostic for the detection of Sr36. TheSr36-linked Xstm773 allele showed better amplification than the Sr36-linked Xgwm271A allele. These markers could be used for marker assisted identification of Sr36 in breeding populations.
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Larkin, P. J., P. M. Banks, E. S. Lagudah, R. Appels, Chen Xiao, Xin Zhiyong, H. W. Ohm, and R. A. McIntosh. "Disomic Thinopyrum intermedium addition lines in wheat with barley yellow dwarf virus resistance and with rust resistances." Genome 38, no. 2 (April 1, 1995): 385–94. http://dx.doi.org/10.1139/g95-050.
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Zhong 5 is a partial amphiploid (2n = 56) between Triticum aestivum (2n = 42) and Thinopyrum intermedium (2n = 42) carrying all the chromosomes of wheat and seven pairs of chromosomes from Th. intermedium. Following further backcrossing to wheat, six independent stable 2n = 44 lines were obtained representing 4 disomic chromosome addition lines. One chromosome confers barley yellow dwarf virus (BYDV) resistance, whereas two other chromosomes carry leaf and stem rust resistance; one of the latter also confers stripe rust resistance. Using RFLP and isozyme markers we have shown that the extra chromosome in the Zhong 5-derived BYDV resistant disomic addition lines (Z1, Z2, or Z6) belongs to the homoeologous group 2. It therefore carries a different locus to the BYDV resistant group 7 addition, L1, described previously. The leaf, stem, and stripe rust resistant line (Z4) carries an added group 7 chromosome. The line Z3 has neither BYDV nor rust resistance, is not a group 2 or group 7 addition, and is probably a group 1 addition. The line Z5 is leaf and stem rust resistant, is not stripe rust resistant, and its homoeology remains unknown.Key words: Agropyron, intermediate wheatgrass, leaf rust, stem rust, stripe rust, luteovirus.
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Wamalwa, Mercy N., James Owuoche, Joshua Ogendo, and Ruth Wanyera. "Multi-Pathotype Testing of Selected Kenyan Wheat Germplasm and Watkin Landraces for Resistance to Wheat Stripe Rust (Puccinia striiformis f. sp tritici) Races." Agronomy 9, no. 11 (November 18, 2019): 770. http://dx.doi.org/10.3390/agronomy9110770.
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Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the key diseases of economic importance in wheat worldwide. Host resistance, which follows the gene-for-gene hypothesis between the host and pathogen, has been used in wheat lines to resolve resistance specificities and postulate resistant genes. The objective of this study was to elucidate stripe rust resistance in a collection of Kenyan wheat lines and Watkin landraces to identify new sources of stripe rust (Yr) resistance. In this study, the resistance in twenty wheat lines was determined by comparing their infection type with those of twenty differential lines using isolates representing twelve Puccinia striiformis races from Kenya, Denmark, U.K., Sweden, and Eritrea at the seedling stage. Among the twenty wheat lines, none was resistant to all the twelve Pst races and isolate DK02d/12 (“Kranich” race) was virulent on all the genotypes except wheat genotype “Kenya Tai.” This genotype (“Kenya Tai”) had the highest resistance as it was resistant to all the twelve stripe rust races used in this study. From this study, the introduction and utilization of wheat genotypes with adult plant resistant (APR) stripe rust genes, such as Yr15, are important in breeding wheat genotypes with effective resistance to wheat stripe rust in Kenya and worldwide.
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Ruan, Chao, Yingying Dong, Wenjiang Huang, Linsheng Huang, Huichun Ye, Huiqin Ma, Anting Guo, and Yu Ren. "Prediction of Wheat Stripe Rust Occurrence with Time Series Sentinel-2 Images." Agriculture 11, no. 11 (November 1, 2021): 1079. http://dx.doi.org/10.3390/agriculture11111079.
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Wheat stripe rust has a severe impact on wheat yield and quality. An effective prediction method is necessary for food security. In this study, we extract the optimal vegetation indices (VIs) sensitive to stripe rust at different time-periods, and develop a wheat stripe rust prediction model with satellite images to realize the multi-temporal prediction. First, VIs related to stripe rust stress are extracted as candidate features for disease prediction from time series Sentinel-2 images. Then, the optimal VI combinations are selected using sequential forward selection (SFS). Finally, the occurrence of wheat stripe rust in different time-periods is predicted using the support vector machine (SVM) method. The results of the features selected demonstrate that, before the jointing period, the optimal VIs are related to the biomass, pigment, and moisture of wheat. After the jointing period, the red-edge VIs related to the crop health status play important roles. The overall accuracy and Kappa coefficient of the prediction model, which is based on SVM, is generally higher than those of the k-nearest neighbor (KNN) and back-propagation neural network (BPNN) methods. The SVM method is more suitable for time series predictions of wheat stripe rust. The model obtained accuracy based on the optimal VI combinations and the SVM increased over time; the highest accuracy was 86.2%. These results indicate that the prediction model can provide guidance and suggestions for early disease prevention of the study site, and the method combines time series Sentinel-2 images and the SVM, which can be used to predict wheat stripe rust.
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Morales, Laura, Christian Ametz, Hermann Gregor Dallinger, Franziska Löschenberger, Anton Neumayer, Simone Zimmerl, and Hermann Buerstmayr. "Comparison of linear and semi-parametric models incorporating genomic, pedigree, and associated loci information for the prediction of resistance to stripe rust in an Austrian winter wheat breeding program." Theoretical and Applied Genetics 136, no. 1 (January 2023): 1–12. http://dx.doi.org/10.1007/s00122-023-04249-6.
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Abstract Key message We used a historical dataset on stripe rust resistance across 11 years in an Austrian winter wheat breeding program to evaluate genomic and pedigree-based linear and semi-parametric prediction methods. Abstract Stripe rust (yellow rust) is an economically important foliar disease of wheat (Triticum aestivum L.) caused by the fungus Puccinia striiformis f. sp. tritici. Resistance to stripe rust is controlled by both qualitative (R-genes) and quantitative (small- to medium-effect quantitative trait loci, QTL) mechanisms. Genomic and pedigree-based prediction methods can accelerate selection for quantitative traits such as stripe rust resistance. Here we tested linear and semi-parametric models incorporating genomic, pedigree, and QTL information for cross-validated, forward, and pairwise prediction of adult plant resistance to stripe rust across 11 years (2008–2018) in an Austrian winter wheat breeding program. Semi-parametric genomic modeling had the greatest predictive ability and genetic variance overall, but differences between models were small. Including QTL as covariates improved predictive ability in some years where highly significant QTL had been detected via genome-wide association analysis. Predictive ability was moderate within years (cross-validated) but poor in cross-year frameworks.
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Gebrewahid, Takele Weldu, Yue Zhou, Peipei Zhang, Yong Ren, Pu Gao, Xianchun Xia, Zhonghu He, Zaifeng Li, and Daqun Liu. "Mapping of Stripe Rust and Leaf Rust Resistance Quantitative Trait Loci in the Chinese Spring Wheat Line Mianyang351-15." Phytopathology® 110, no. 5 (May 2020): 1074–81. http://dx.doi.org/10.1094/phyto-08-19-0316-r.
Full textAbstract:
Stripe rust and leaf rust cause wheat yield losses of up to 70% worldwide. The employment of resistant cultivars is the major method to reduce losses from these diseases. The objective of this study was to detect quantitative trait loci (QTL) for stripe rust and leaf rust resistance in 150 F6 recombinant inbred lines (RIL) derived from a cross between Mianyang351-15 and Zhengzhou 5389. Both parents and the RIL population were genotyped with the Wheat55K single nucleotide polymorphism (SNP) array and simple sequence repeat markers, and phenotyped for stripe rust severity at Mianyang in Sichuan Province and Baoding in Hebei Province, and for leaf rust severity at Zhoukou in Henan Province and at Baoding in 2014 to 2017 cropping seasons. Seven and four QTL all contributed from Mianyang351-15 were identified for resistance to stripe rust and leaf rust, respectively. Four of these QTL on chromosomes 1BL, 2AS, 2DS, and 7BL conferred resistance to both stripe rust and leaf rust. The QTL on 1BL, 2AS, and 7BL were identified as Lr46/Yr29, Lr37/Yr17, and Lr68, respectively. QYr.hbau-2DS/QLr.hbau-2DS was detected at similar positions to previously reported loci. QYr.hbau-1DL, QYr.hbau-3AS, and QYr.hbau-3DL are likely to be new. Combined effects of QTL in the RIL population indicated RIL combining all QTL had the highest resistance level compared with those of lower numbers or no QTL. These QTL, with their closely linked SNP markers, are applicable for marker-assisted breeding and candidate gene discovery.
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Chng, S. F., M. G. Cromey, and S. C. Shorter. "Durability of resistance to stripe rust in the wheat cultivar Claire in New Zealand." New Zealand Plant Protection 64 (January 8, 2011): 17–24. http://dx.doi.org/10.30843/nzpp.2011.64.5975.
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Host resistance is the most economical way to manage wheat stripe rust caused by Puccinia striiformis f sp tritici The cultivar Claire was released in 1999 and until recently remained highly resistant to the disease in the United Kingdom While Claire was considered durably resistant to stripe rust in New Zealand it is now categorised as moderately susceptible The present study investigated whether racespecific resistance was responsible for this breakdown in resistance and whether cv Claire retains useful durable resistance A rust culture from cv Claire was compared with a pre2005 culture on a set of differential cultivars The seedling resistance in cv Claire was racespecific Greenhouse and field experiments suggest that the adult plant resistance in cv Claire has been reduced in the presence of a more virulent stripe rust population Remaining adult plant resistance is insufficient to provide adequate control of stripe rust in New Zealand wheat crops
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Ponce-Molina, L. J., J. Huerta-Espino, R. P. Singh, B. R. Basnet, G. Alvarado, M. S. Randhawa, C. X. Lan, V. H. Aguilar-Rincón, R. Lobato-Ortiz, and J. J. García-Zavala. "Characterization of Leaf Rust and Stripe Rust Resistance in Spring Wheat ‘Chilero’." Plant Disease 102, no. 2 (February 2018): 421–27. http://dx.doi.org/10.1094/pdis-11-16-1545-re.
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Since 1984, the ‘Chilero’ spring wheat line developed by CIMMYT has proven to be highly resistant to leaf rust and stripe rust. Amid efforts to understand the basis of resistance of this line, a recombinant inbred line (RIL) population derived from a cross between Avocet and Chilero was studied. The parents and RILs were characterized in field trials for leaf rust and stripe rust in three locations in Mexico between 2012 and 2015 and genotyped with DArT-array, DArT-GBS, and SSR markers. A total of 6,168 polymorphic markers were used to construct genetic linkage maps. Inclusive composite interval mapping detected four colocated resistance loci to both rust diseases and two stripe rust resistant loci in the Avocet × Chilero population. Among these, the quantitative trait locus (QTL) on chromosome 1BL was identified as a pleotropic adult plant resistance gene Lr46/Yr29, whereas QLr.cim-5DS/QYr.cim-5DS was a newly discovered colocated resistance locus to both rust diseases in Chilero. Additionally, one new stripe rust resistance locus on chromosome 7BL was mapped in the current population. Avocet also contributed two minor colocated resistance QTLs situated on chromosomes 1DL and 4BS. The flanking SNP markers can be converted to breeder friendly Kompetitive Allele Specific PCR (KASP) markers for wheat breeding programs.
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SARABJOT KAUR SANDHU, PARMINDER SINGH TAK, and P. P. S. PANNU. "Forewarning of stripe rust (Puccinia striiformis) of wheat in central zone of Punjab." Journal of Agrometeorology 23, no. 4 (November 11, 2021): 435–41. http://dx.doi.org/10.54386/jam.v23i4.160.
Full textAbstract:
Wheat crop is attacked by number of diseases some of which cause yield losses and deteriorates quality. Rust pathogens are most important pathogens of wheat which can cause considerable economic losses if uncontrolled. Stripe rust, caused by Puccinia striiformis f. sp. tritici, is an important wheat disease common in wheat growing areas experiencing cold and humid weather conditions during the crop season. Different meteorological parameters influence occurrence and development of stripe rust in northern India including Punjab. Based on investigations on relationship of stripe rust with weather parameters, weather based prediction model for stripe rust was developed using disease severity and weather data (2007-08 to 2018-19) recorded at Ludhiana. The data of 2009-10 and 2019-20 was used for validation of model. Regression model based on maximum and minimum temperature, morning relative humidity and sunshine hours gave good results. Validation of model indicated that relationship between observed values of disease and predicted values was very close.
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Roelfs, A. P. "Barley Stripe Rust in Texas." Plant Disease 76, no. 5 (1992): 538C. http://dx.doi.org/10.1094/pd-76-0538c.
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Mallick, Niharika, Shailendra K. Jha, Priyanka Agarwal, Anchal Mall, Niranjana M., Sachin Kumar, Manish K. Choudhary, et al. "Marker-Assisted Improvement of Bread Wheat Variety HD2967 for Leaf and Stripe Rust Resistance." Plants 11, no. 9 (April 24, 2022): 1152. http://dx.doi.org/10.3390/plants11091152.
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The mega wheat variety HD2967 was improved for leaf and stripe rust resistance by marker-assisted backcross breeding. After its release in 2011, HD2967 became susceptible to stripe rust and moderately susceptible to leaf rust. The leaf rust resistance gene LrTrk was transferred into HD2967 from the durum wheat genotype Trinakria. Then, HD2967 was crossed with Trinakria to produce F1 plant foreground selection for LrTrk and background selection for the recurrent parent genotype was carried out in BC1F1, BC2F1 and BC2F2 generations. Foreground selection was carried out with the linked marker Xgwm234, while polymorphic SSR markers between parents were used for background selection. Background selection resulted in the rapid recovery of the recurrent parent genome. A morphological evaluation of 6 near isogenic lines (NILs)—2 resistant to leaf and stripe rust, and 4 resistant to leaf rust only—showed no significant differences in yields among NILs and the recurrent parent HD2967. All of the 6 NILs showed the presence of 2NS/2AS translocation, carrying the linked genes Lr37/Sr38/Yr17 present in HD2967 and the targeted leaf rust resistance gene LrTrk. Two NILs also showed additional resistance to stripe rust. Therefore, these NILs with rust resistance and an at par yielding ability of H2967 can replace the susceptible cultivar HD2967 to reduce yield losses due to disease.
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Mallick, Niharika, Shailendra K. Jha, Priyanka Agarwal, Anchal Mall, Niranjana M., Sachin Kumar, Manish K. Choudhary, et al. "Marker-Assisted Improvement of Bread Wheat Variety HD2967 for Leaf and Stripe Rust Resistance." Plants 11, no. 9 (April 24, 2022): 1152. http://dx.doi.org/10.3390/plants11091152.
Full textAbstract:
The mega wheat variety HD2967 was improved for leaf and stripe rust resistance by marker-assisted backcross breeding. After its release in 2011, HD2967 became susceptible to stripe rust and moderately susceptible to leaf rust. The leaf rust resistance gene LrTrk was transferred into HD2967 from the durum wheat genotype Trinakria. Then, HD2967 was crossed with Trinakria to produce F1 plant foreground selection for LrTrk and background selection for the recurrent parent genotype was carried out in BC1F1, BC2F1 and BC2F2 generations. Foreground selection was carried out with the linked marker Xgwm234, while polymorphic SSR markers between parents were used for background selection. Background selection resulted in the rapid recovery of the recurrent parent genome. A morphological evaluation of 6 near isogenic lines (NILs)—2 resistant to leaf and stripe rust, and 4 resistant to leaf rust only—showed no significant differences in yields among NILs and the recurrent parent HD2967. All of the 6 NILs showed the presence of 2NS/2AS translocation, carrying the linked genes Lr37/Sr38/Yr17 present in HD2967 and the targeted leaf rust resistance gene LrTrk. Two NILs also showed additional resistance to stripe rust. Therefore, these NILs with rust resistance and an at par yielding ability of H2967 can replace the susceptible cultivar HD2967 to reduce yield losses due to disease.
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Chemayek, Bosco, Urmil K. Bansal, Hanif Miah, William W. Wagoire, and Harbans S. Bariana. "Assessment of Genetic Diversity for Stem Rust and Stripe Rust Resistance in an International Wheat Nursery Using Phenotypic and Molecular Technologies." Uganda Journal of Agricultural Sciences 20, no. 1 (December 1, 2021): 1–27. http://dx.doi.org/10.4314/ujas.v20i1.1.
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The objective of this study was to assess diversity for stem rust and stripe rust resistance in an international wheat screening nursery under greenhouse conditions using pathotypes with known avirulence/ virulence profiles. A set of 95 entries of an international wheat screening nursery collected from material generated by staff of the International Maize and Wheat Improvement Centre (CIMMYT) was tested against seven Australian Pgt and five Pst pathotypes through artificial inoculation under the greenhouse conditions using standard procedures. Ten all-stage stem rust resistance genes (Sr8a, Sr8b, Sr9b, Sr12, Sr17, Sr23, Sr24, Sr30, Sr31 and Sr38) and seven all-stage stripe rust resistance genes (Yr3, Yr4, Yr6, Yr9, Yr17, Yr27 and Yr34) were postulated either singly or in combinations based on seedling responses of test entries against pathotypes differing in virulence for commonly deployed genes. Sr30 and Sr38 were the most common stem rust resistance genes in this nursery. The Sr38-linked stripe rust resistance gene Yr17 was present in high proportion. The presence of rust resistance genes Sr24, Sr31/Yr9, Sr38/Yr17 and Yr4 were confirmed using the closely linked molecular markers. The adult plant resistance (APR) genes Sr2 and Lr34/Yr18/Sr57 were detected using linked molecular markers csSr2 and csLV34, respectively. Genotypes carrying combinations of stem rust and stripe rust resistance were identified for use as donor sources in breeding programs.
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Randhawa, H., B. J. Puchalski, M. Frick, A. Goyal, T. Despins, R. J. Graf, A. Laroche, and D. A. Gaudet. "Stripe rust resistance among western Canadian spring wheat and triticale varieties." Canadian Journal of Plant Science 92, no. 4 (July 2012): 713–22. http://dx.doi.org/10.4141/cjps2011-252.
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Randhawa, H., Puchalski, B. J., Frick, M., Goyal, A., Despins, T., Graf, R. J., Laroche, A. and Gaudet, D. A. 2012. Stripe rust resistance among western Canadian spring wheat and triticale varieties. Can. J. Plant Sci. 92: 713–722. Stripe rust (Puccinia striiformis Westend.) is an important pathogen of wheat in western Canada and worldwide. One hundred and four spring wheat and triticale varieties and cultivars were evaluated for resistance to stripe rust in nurseries at Lethbridge and Creston, BC, during 2009 and 2010. In the Canada Prairie Spring Red (CPSR) wheat class, newer varieties were more resistant compared with many of the older varieties. Among the white Canada Prairie Spring White (CPSW) wheats, Vista was moderately resistant, whereas Snowhite475 and Snowhite476 were susceptible. Little useful resistance was observed within the Canada Western Hard White Spring (CWHWS) class. Sixty percent of the Canada Western Red Spring (CWRS) wheats, including the currently popular varieties Lillian, Harvest and Kane, were resistant. Susceptible CWRS varieties that are extensively seeded in western Canada include AC Barrie, Superb and McKenzie, but also include the recently registered CDC Kernen and Vesper. The varieties were tested for the presence of the stripe rust genes Yr10, Yr17, Yr18 and Yr36 using molecular markers. Much of the stripe rust resistance, particularly in the CWRS, Canada Western Extra Strong (CWES), and CPSR wheat classes was attributed to the presence of adult plant resistance gene Yr18. Yr17 and Yr36 were also detected among CWRS and CWES varieties. However, the absence of markers for known genes in several resistant varieties indicated that uncharacterized genes for stripe rust occur among hexaploid wheats. Durum wheat and triticale varieties were universally resistant with the absence of tested markers. Therefore, there appear to be numerous sources of stripe rust resistance, both characterized and uncharacterized, among western Canadian spring wheat and triticale varieties.
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Boshoff, W. H. P., Z. A. Pretorius, and B. D. van Niekerk. "Establishment, Distribution, and Pathogenicity of Puccinia striiformis f. sp. tritici in South Africa." Plant Disease 86, no. 5 (May 2002): 485–92. http://dx.doi.org/10.1094/pdis.2002.86.5.485.
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Stripe rust, caused by Puccinia striiformis Westend. f. sp. tritici Eriks., has become an endemic disease of wheat (Triticum aestivum L.) in South Africa since it was first observed near Moorreesburg, Western Cape during August 1996. The main objectives of this study were to monitor the occurrence, spread, and the possible development of new variants of the stripe rust pathogen and the susceptibility of grass species to the pathogen. Results of surveys conducted during 1996 to 1999 revealed that rainfed wheat produced in the Western Cape, Eastern Cape, and the eastern Free State, as well as irrigated wheat produced in KwaZulu-Natal and the Free State, are most likely to be affected by stripe rust epidemics. Pathotype 6E16A- with virulence to Yr2, Yr6, Yr7, Yr8, Yr11, Yr14, Yr17, and Yr19 and pathotype 6E22A- with added virulence to Yr25 were detected. The occurrence of pathotype 6E22A- is currently restricted to KwaZulu-Natal and the Free State. Stripe rust isolates found on Hordeum murinum L. in the Western Cape were identified as pathotype 6E16A-, and both pathotypes 6E16A- and 6E22A- were collected from Bromus catharticus Vahl (= B. unioloides H.B.K.) in the eastern Free Sate. Urediospores from infections similar to stripe rust found on the grass species Dactylis glomerata L. (Eastern Cape), Poa pratensis L. (= P. bidentata Stapf; Western Cape), and P. annua and P. triviales L. (eastern Free State) failed to infect wheat cv. Morocco seedlings in the glasshouse. The possible role of grasses in the over-summering of the stripe rust pathogen has not yet been established. Stripe rust infections, however, have been found on summer-sown wheat in the south Western Cape during 1998, volunteer wheat growing in the summer and autumn months in the eastern Free State from 1998 to 2000, and on summer-sown wheat in Lesotho.
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Hu, Tian, Xiao Zhong, Qiang Yang, Xinli Zhou, Xin Li, Suizhuang Yang, Lu Hou, Qiang Yao, Qingyun Guo, and Zhensheng Kang. "Introgression of Two Quantitative Trait Loci for Stripe Rust Resistance into Three Chinese Wheat Cultivars." Agronomy 10, no. 4 (April 1, 2020): 483. http://dx.doi.org/10.3390/agronomy10040483.
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Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most devastating diseases in wheat. Due to the large-scale and widely-distributed planting pattern of wheat, the directional selection pressure of the pathogen is very strong. Therefore, it is urgent to pyramid more stripe rust resistance genes in wheat cultivars to enhance resistance durability and ensure wheat production safety. In this study, two quantitative trait loci (QTL) for adult plant resistance (APR) to stripe rust, QYr.nafu-2BL and QYr.nafu-3BS, were validated and introgressed from wheat line P9897 into three Chinese elite wheat cultivars, Chuanmai 42, Xiangmai 25, and Zhengmai 9023, through marker validation. The three Chinese elite varieties were used as the female parent to cross with wheat line P9897, and they were selfed to the F6 generation. A total of 114 lines were then selected based on field agronomic traits and stripe rust resistance. Four markers (Xcfd73, Xgwm120, Xbarc87 and Xbarc133) linked with the QTL’s regions were employed to screen the 114 F6 lines. Subsequently, 27 lines combining two target QTL from P9897 were selected. The combination of agronomic traits and disease resistance results showed that 13 of these selected lines had favorable application prospects. The promising lines selected in this study could enrich the genetic resources of wheat stripe rust resistance genes, as well as provide material support and a theoretical basis for the prevention and control of wheat stripe rust in China.
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Yang, Qian, Baoyu Huai, Yuxi Lu, Kunyan Cai, Jia Guo, Xiaoguo Zhu, Zhensheng Kang, and Jun Guo. "A stripe rust effector Pst18363 targets and stabilises TaNUDX23 that promotes stripe rust disease." New Phytologist 225, no. 2 (October 16, 2019): 880–95. http://dx.doi.org/10.1111/nph.16199.
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Chao, Kaixiang, Jinye Yang, Huan Liu, Jinxue Jing, Qiang Li, Baotong Wang, and Dongfang Ma. "Genetic and Physical Mapping of a Putative Leymus mollis-Derived Stripe Rust Resistance Gene on Wheat Chromosome 4A." Plant Disease 102, no. 5 (May 2018): 1001–7. http://dx.doi.org/10.1094/pdis-05-17-0671-re.
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Wheat stripe rust is one of the most damaging diseases of wheat worldwide. The wheat-Leymus mollis introgression line M8664-3 exhibits all-stage resistance to Chinese stripe rust races. Genetic analysis of stripe rust resistance was performed by crossing M8664-3 with the susceptible line Mingxian169. Analysis of the disease resistance of F2 and F2:3 populations revealed that its resistance to Chinese stripe rust race 33 (CYR33) is controlled by a single dominant gene, temporarily designated as YrM8664-3. Genetic and physical mapping showed that YrM8664-3 is located in bin 4AL13-0.59-0.66 close to 4AL12-0.43-0.59 on chromosome 4AL and is flanked by single-nucleotide polymorphism markers AX111655681 and AX109496237 with genetic distances of 5.3 and 2.3 centimorgans, respectively. Resistance spectrum and position analyses indicated that YrM8664-3 may be a novel gene. Molecular detection using the markers linked to YrM8664-3 with wheat varieties commonly cultivated and wheat-L. mollis-derived lines showed that YrM8664-3 is also present in other wheat-L. mollis introgression lines but absent in commercial common wheat cultivars. Thus, YrM8664-3 is a potentially valuable source of stripe rust resistance for breeding.
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Luo, P. G., Z. L. Ren, H. Q. Zhang, and H. Y. Zhang. "Identification, Chromosome Location, and Diagnostic Markers for a New Gene (YrCN19) for Resistance to Wheat Stripe Rust." Phytopathology® 95, no. 11 (November 2005): 1266–70. http://dx.doi.org/10.1094/phyto-95-1266.
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Several wheat lines and cultivars of wheat (Triticum aestivum) originating from the southwestern region of China were found to be highly resistant to stripe rust by inoculation with the prevalent races (CYR30, CYR31, and CYR32) and newly emerged races (H46-4, SY11-4 and SY11-14) of the pathogen. An inheritance study of the resistance to stripe rust was carried out by crossing resistant AIM6 with susceptible BeiZ76. Results indicated that the resistance to stripe rust was controlled by a single dominant gene. The 112 F2 plants chosen from the cross BeiZ76/ AIM6 were analyzed with 218 pairs of microsatellite primers to determine the map location of the resistance gene. A simple sequence repeat marker on chromosome arm 2BS, Xgwm410, showed polymorphism and co-segregation between stripe rust resistant and susceptible plants. From the pedigree, inheritance, molecular marker, and resistance response, it is concluded that the stripe rust resistance gene in wheat cv. Chuan-nong19 (CN19) and wheat lines AIM5 and AIM6 is a novel gene, designated YrCN19. The microsatellite primer Xgwm410 is a diagnostic marker of the resistance gene YrCN19, which has potential for application in the marker-assisted breeding of wheat.
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Cheng, Bin, Xu Gao, Ning Cao, Yanqing Ding, Yu Gao, Tianqing Chen, Zhihai Xin, and Liyi Zhang. "Genome-wide association analysis of stripe rust resistance loci in wheat accessions from southwestern China." Journal of Applied Genetics 61, no. 1 (January 7, 2020): 37–50. http://dx.doi.org/10.1007/s13353-019-00533-8.
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AbstractWheat stripe rust can cause considerable yield losses, and genetic resistance is the most effective approach for controlling the disease. To identify the genomic regions responsible for Puccinia striiformis f. sp. tritici (Pst) resistance in a set of winter wheat strains mainly from southwestern China, and to identify DNA markers in these regions, we carried out a genome-wide association study (GWAS) of 120 China winter wheat accessions using single nucleotide polymorphism (SNP) markers from 90K wheat SNP arrays. In total, 16 SNP loci were significantly associated with wheat stripe rust in field and greenhouse trials. Of these, three distinctive SNPs on chromosomes 1B, 4A, and 6A were identified at a site in Mianyang in 2014, where the most prevalent wheat stripe rust races since 2009 have been V26 (G22-9, G22-14). This suggests that the three SNP loci were linked to the new quantitative trait loci (QTL)/genes resistant to the V26 races. Germplasm with immunity to Pst is a good source of stripe rust resistance for breeding, and after further validation, SNPs closely linked to resistance QTLs/genes could be converted into user-friendly markers and facilitate marker-assisted selection to improve wheat stripe rust resistance.