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Journal articles on the topic 'Varieties Resistance'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Pink, D. A. C., and P. Hand. "Plant resistance and strategies for breeding resistant varieties." Plant Protection Science 38, SI 1 - 6th Conf EFPP 2002 (2002): S9—S14. http://dx.doi.org/10.17221/10310-pps.

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An explanation of the ‘boom-bust’ cycle of resistance breeding was provided by the gene-for-gene relationship between a pathogen and its host. Despite this understanding, most R genes continued to be deployed singly and resistance has been ephemeral. The reasons for breeding ‘single R gene’ varieties are discussed. Alternative strategies for the deployment of R genes and the use of quantitative race non-specific resistance have been advocated in order to obtain durable resistance. The feasibility of both of these approaches is discussed taking into account the impact of technologies such as pl

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2

Aybekovich, Zuftarov Erkin, and Islamov Sokhib Yakhshibekovich. "STUDY OF DROUGHT RESISTANCE OF RASPBERRY VARIETIES." American Journal of Agriculture and Biomedical Engineering 6, no. 1 (2024): 23–28. http://dx.doi.org/10.37547/tajabe/volume06issue01-06.

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This article presents the results of the study of drought resistance of raspberry varieties. In this, drought resistance was evaluated by studying the water deficit, amount of water and water loss abilities of leaf tissues before and after irrigation in June, July, and August. In the leaves of raspberry varieties, water deficit and water loss capacity were higher at 1 pm in July, while leaf amount of water was the lowest at 1 pm in July.

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3

Dreiseitl, A. "Powdery Mildew Resistance of Foreign Spring Barley Varieties in Czech Official Trials." Czech Journal of Genetics and Plant Breeding 42, No. 1 (2011): 1–8. http://dx.doi.org/10.17221/3656-cjgpb.

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In 1993&ndash;2005, resistance to powdery mildew was studied in 168 foreign varieties of spring barley included in Czech Official Trials in that period. Sixteen known resistances to powdery mildew were identified (Ab, Al, Ar, HH, Kw, La, Ly, MC, Mlo, N81, Ri, Ru, Sp, St, Tu, and We). Unknown resistances were found in 32 varieties, in nine of which these resistances were effective against all used pathotypes of the pathogen. Seven varieties (= 5%) exhibited heterogeneity in the examined trait, i.e. they are composed of lines (usually of two) with different resistances to powder mildew. The

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4

Hammad, Amin, Lateif Mahfoozullah, Ajan Mominzai Muhammad, Rahmatzai Najibullah, and Baheer Shafiullah. "Screening of Wheat Different Varieties against stripe rust (Puccinia striformis f. sp. tritici) in Baghlan Province-Afghanistan." International Journal of Current Science Research and Review 07, no. 08 (2024): 6636–42. https://doi.org/10.5281/zenodo.13350504.

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Abstract : Wheat strip rust is the most devastating fungal disease in the north Provinces of Afghanistan, causes heavy losses on this staple food crop for the last two years. Therefore, the experiment was carried out under field conditions in 2023, to screen the most growing wheat varieties against stripe rust disease. A total of 18 different varieties were used for this study to find out the resistant varieties. The study revealed that, among all tested varieties no one was found with complet resistance reaction against strip rust (yellow leaf rust). 12 varieties such as Pat wheat, Hazardana

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Dreiseitl, Antonín, and Gregory Platz. "Powdery mildew resistance genes in barley varieties grown in Australia." Crop and Pasture Science 63, no. 10 (2012): 997. http://dx.doi.org/10.1071/cp12165.

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Barley (Hordeum vulgare L.) is a major crop in Australia and powdery mildew (Blumeria graminis f. sp. hordei) is one of its most common diseases. Genes for resistance to powdery mildew were postulated for 86 Australian barley varieties and nine advanced breeding lines using 40 reference isolates of the pathogen. Fifty isolates collected in Australia in 2011 were used for additional tests of some varieties. In total, 22 known resistance genes [mlo, Mla1, MlaAl2, Mla3, Mla6, Mla7, Mla8, Mla9, Mla12, Mla13, Mlat, Mlg, MlGa, Mlk1, MlLa, Mlra, Ml(Ab), Ml(Ch), Ml(Dr2), Ml(He2), Ml(Lo) and Ml(St)] we

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6

Cabunagan, R. C., Z. M. Flores, E. C. Coloquio, and H. Koganezawa. "Virus Detection in Varieties Resistant to Tungro (RTD)." International Rice Research Notes 18, no. 1 (1993): 22–23. https://doi.org/10.5281/zenodo.6823013.

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This article 'Virus Detection in Varieties Resistant to Tungro (RTD)' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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7

Dreiseitl, A. "Powdery Mildew Resistance of Winter Barley Varieties in Czech Official Trials." Czech Journal of Genetics and Plant Breeding 42, No. 2 (2011): 38–43. http://dx.doi.org/10.17221/3652-cjgpb.

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In 1996&ndash;2005, resistance to powdery mildew was studied in 167 winter barley varieties (of them 83&nbsp;two-rowed and 84 six-rowed, 45 Czech and 122 foreign ones) included in the Czech Official Trials in that period. Seventeen known resistances to powdery mildew were identified (Ar, Bw, Di, Dr, Dt, Ha, HH, Ch, IM9, La, Lu, Ly, Ra, Ru, Sp, St and We). Unknown resistances were found in 25 varieties, in six of which (= 3.6% of all the examined set) they were effective to all used pathotypes of the pathogen. Six varieties exhibited heterogeneity in the examined trait, i.e. they are co

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8

Zhu, Z. Q., and Y. W. Li. "Evaluation of Promising Rice Varieties for Thrips Resistance." International Rice Research Newsletter 10, no. 4 (1985): 6–7. https://doi.org/10.5281/zenodo.7099670.

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This article 'Evaluation of Promising Rice Varieties for Thrips Resistance' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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9

Reddy, A. P. K., and A. O. Bastawisi. "Resistance to Blast (Bl) in Egyptian Rice Varieties." International Rice Research Newsletter 15, no. 3 (1990): 12–13. https://doi.org/10.5281/zenodo.7179344.

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This article 'Resistance to Blast (Bl) in Egyptian Rice Varieties' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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10

Dreiseitl, A., and P. Pařízek. "Resistance of Spring Barley Varieties to Powdery Mildew in theCzechRepublicin 1971–2000." Czech Journal of Genetics and Plant Breeding 39, No. 2 (2011): 31–44. http://dx.doi.org/10.17221/3718-cjgpb.

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Resistance to powdery mildew of 127 spring barley varieties was evaluated in 702 official variety trials, using scores from 1 to 9. Trials with sufficient disease severity were only analysed. Varieties possessing the resistance genes Mla7 (Elgina), Ml(Kr) (BR-1519), Mla13 (Koral) and mlo (Forum) were among the most resistant ones. The varieties Diamant, HE-3527, HE-3631, II/61-FUDII and Zefir showed high susceptibility. Fifteen varieties, carrying the genes Mla1, Mla3, Mla6, Mla9, Mla13, Ml(Kr) and Ml(Sc), were in the first years of testing highly resistant, but became susceptible later. The s

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11

Y. Lan and O. R. Kunze. "Fissure Resistance of Rice Varieties." Applied Engineering in Agriculture 12, no. 3 (1996): 365–68. http://dx.doi.org/10.13031/2013.25660.

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12

Dreiseitl, A. "Variety resistance of winter barley to powdery mildew in the field in 1976−2005." Czech Journal of Genetics and Plant Breeding 43, No. 3 (2008): 87–96. http://dx.doi.org/10.17221/2067-cjgpb.

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The results of evaluation of powdery mildew resistance in winter barley varieties in 285 Czech Official Trials conducted at 20 locations were analysed. Over the period, the number of varieties tested per year increased from four to seven in 1976−1985 to 53−61 in 2002−2005. To assess the resistance of varieties, only trials with sufficient disease severity were used. In 1976−2000, six varieties (1.7% of the varieties tested in the given years) ranked among resistant (average resistance of a variety in a year > 7.5) including NR-468 possessing the gene <i>Mla13</i>, KM-2099 with &

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13

Novokhatan, V. V., E. V. Zuev, T. V. Shelomentseva, and T. A. Leonova. "The source material of soft spring wheat for improving the quality of grain and resistance to lodging." BIO Web of Conferences 36 (2021): 01023. http://dx.doi.org/10.1051/bioconf/20213601023.

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The Northern Trans-Urals is a region of intensive agriculture that needs high-yielding varieties that are resistant to lodging and a-biotic environmental factors, forming high-quality grain. In this respect, as a starting material for breeding, Canadian varieties with good technological indicators of grain and Norwegian varieties with high resistance to lodging and well-expressed economic and valuable characteristics are of interest. An important indicator when creating wheat varieties is the resistance to pre-harvest germination of grain on the root. The conjugacy of this feature with the yie

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14

Tan, Y. J., Y. Pan, Y. Zhang, L. X. Zhao, and Y. K. Xu. "Resistance to Gall Midge (GM) Orseolia oryzae in Chinese Rice Varieties Compared with Varieties From Other Countries." International Rice Research Notes 18, no. 4 (1993): 13–14. https://doi.org/10.5281/zenodo.7000226.

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This article 'Resistance to Gall Midge (GM) Orseolia oryzae in Chinese Rice Varieties Compared with Varieties From Other Countries' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain detai

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15

Sha, X. Y., and L. H. Zhu. "Resistance of Some Rice Varieties to Sheath Blight (ShB)." International Rice Research Newsletter 15, no. 6 (1990): 7–8. https://doi.org/10.5281/zenodo.7214663.

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This article 'Resistance of Some Rice Varieties to Sheath Blight (ShB)' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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16

Sadykov, Esbosyn Polatovich, Biisenbai Aripovich Bekbanov, Bibinaz Muratbaevna Kosbergenova, and Raikhan Mukhammedovna Aimuratova. "Winter Resistance Of Winter Wheat Under Extreme Conditions." American Journal of Agriculture and Biomedical Engineering 03, no. 07 (2021): 1–10. http://dx.doi.org/10.37547/tajabe/volume03issue07-01.

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The article discusses the issue of frost resistance of varieties and samples of winter wheat sown at different depths, in the extreme conditions of Karakalpakstan. Both a decrease and an excessive deepening of sowing leads to a significant decrease in their resistance to low temperatures, which negatively affects their subsequent survival in the spring-summer period. On the basis of the data, 2 varieties were selected, they turned out to be frost-resistant and differed in good yield and other valuable traits in comparison with the zoned varieties. They were transferred to the State Commission

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17

Gopalan, M., N. C. Radja, and G. Balasubramanian. "Screening Rice Varieties for Resistance to Mealybug." International Rice Research Newsletter 12, no. 4 (1987): 18. https://doi.org/10.5281/zenodo.7122965.

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This article 'Screening Rice Varieties for Resistance to Mealybug' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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18

Pospisil, A., J. Benada, and I. Polisenská. "Variability of resistance to common bunt of wheat." Plant Protection Science 35, No. 1 (1999): 26–29. http://dx.doi.org/10.17221/9670-pps.

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During 1997–1998, the reaction of the collections of winter and spring wheat varieties to Tilletia caries was determined. In both years the most diseased winter varieties were Simona and Sparta, the least diseased were Samara and Ilona. High variability in the level of infection was observed in some varieties (VIada, Estica, Regina, Vega). No winter wheat variety was completely resistant. The most diseased spring wheat variety was Alexandria in both years, while Grandur showed no infection. High variability in the level of infection was observed in the special trials with cv. Ina and Contra. I

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19

Domkářová, J., and B. Vokál. "The evaluation method of potato genotype resistance to blackspot bruise." Plant, Soil and Environment 51, No. 2 (2011): 74–81. http://dx.doi.org/10.17221/3558-pse.

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In 2001&ndash;2003 a method for the evaluation of potato genotype (genetic resource) resistance to blackspot bruise was verified. Thirty tubers of 25 varieties and hybrids of Solanum tuberosum L. were evaluated using electronic pendulum MIDAS 88P. The analysis of variance showed a significant difference among the individual varieties and hybrids and among years as well. An evaluation scale was established for the assessment of potato genotype (genetic resource) resistance to blackspot bruise. Varieties and hybrids were included in the new designed evaluation scale in scores of 7 (high resi

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20

Ukwungwu, M. N. "Resistance of Recommended and Traditional Varieties to Gall Midge (GM)." International Rice Research Newsletter 11, no. 5 (1986): 8. https://doi.org/10.5281/zenodo.7002034.

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This article 'Resistance of Recommended and Traditional Varieties to Gall Midge (GM)' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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21

Lesser, William, and Deepthi Elizabeth Kolady. "Disease Resistance of Wheat Varieties: Can Private Varieties Withstand the Pressure?" Economics Research International 2011 (June 30, 2011): 1–6. http://dx.doi.org/10.1155/2011/575192.

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US wheat varieties are examined for differential disease resistance between public and private varieties, an issue for critics of plant intellectual property. Analysis using disease resistance rankings of wheat varieties from Kansas and Texas indicate that private varieties are as or more resistant. This finding was further confirmed with two years of Texas data. Thus, the results from the study reject the criticism of private breeding activities that they are more susceptible to disease compared to public varieties. However, private varieties resistance is incorporated from public offerings s

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22

Hansen, Z. R., I. M. Small, M. Mutschler, W. E. Fry, and C. D. Smart. "Differential Susceptibility of 39 Tomato Varieties to Phytophthora infestans Clonal Lineage US-23." Plant Disease 98, no. 12 (2014): 1666–70. http://dx.doi.org/10.1094/pdis-03-14-0263-re.

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During the summers of 2012 and 2013, 39 tomato (Solanum lycopersicum) lines or varieties were evaluated for resistance to late blight in three separate field trials. In each trial, late blight was caused by field isolates of Phytophthora infestans clonal lineage US-23. Varieties with the late blight resistance genes Ph-1, Ph-2, Ph-3, and Ph-2 + Ph-3 were included, along with several heirloom varieties with grower-reported resistance and varieties with no known resistance. All six varieties with Ph-2 + Ph-3, along with NC25P, which is homozygous for Ph-3 only, showed a high level of resistance.

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23

Dreiseitl, A. "Adaptation of Blumeria graminis f.sp. hordei to barley resistance genes in the Czech Republic in 1971–2000." Plant, Soil and Environment 49, No. 6 (2011): 241–48. http://dx.doi.org/10.17221/4120-pse.

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Results of scoring the resistance of 35 selected spring barley varieties to powdery mildew, exhibiting high powdery mildew severity, in 307 variety trials of the Central Institute for Supervising and Testing in Agriculture were analysed. The varieties can be divided into two groups: the varieties that could not induce any changes in the pathogen population (the varieties with no effective resistance gene and varieties carrying gene mlo) and the varieties possessing major resistance genes [a&nbsp;total of 12 Ml-genes: a1, a3, a6, a7, a9, a12, a13, at, k1, La, g and (Kr)] to which the pathog

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24

Al-Lami, Hebba F. D., Ming Pei You, and Martin J. Barbetti. "Relative host resistance to Alternaria leaf spot in canola and mustard varieties is defined by Alternaria species." Crop and Pasture Science 71, no. 7 (2020): 689. http://dx.doi.org/10.1071/cp20024.

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Both Alternaria japonica and A. brassicae cause severe Alternaria leaf spot on canola (Brassica napus) and mustard (B. juncea). We tested 103 Brassicaceae varieties including 93 Australian canola, nine Indian mustard, and a single variety of Ethiopian mustard (B. carinata) under greenhouse conditions to identify host resistance to Alternaria leaf spot caused by A. japonica and A. brassicae in terms of disease incidence (percentage leaf disease incidence, %LDI), disease severity (percentage leaf area diseased, %LAD) and defoliation (percentage leaf collapse index, %LCI). Against A. japonica, ac

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25

Golosna, L., O. G. Afanasieva, O. V. Shevchuk, L. O. Kucherova, I. S. Shvets, and L. V. Hubenko. "Immunological characteristics of winter wheat varieties to the main pathogens in the right-bank Forest Steppe." Faktori eksperimental'noi evolucii organizmiv 29 (August 31, 2021): 74–81. http://dx.doi.org/10.7124/feeo.v29.1410.

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Aim. To determine the resistance of winter wheat varieties to the main pathogens, to establish their stability and plasticity, to identify perspective sources of resistance. Methods. Laboratory – production of inoculum of pathogens; field – artificial inoculation,, assessment of variety stability; statistical calculation of disease severity, indicators of stability and plasticity. Results. In 2015–2017, the resistance of 43 varieties of winter wheat to the main pathogens of leaf diseases, common bunt and root rots was assessed. Resistance to powdery mildew was found in 32 varieties, tan spot –

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26

Velusamy, R., R. Rajendran, Babu P. C. Sundara, and G. S. Khush. "Resistance of IR Varieties to Leafhoppers and Planthoppers." International Rice Research Newsletter 12, no. 1 (1987): 10. https://doi.org/10.5281/zenodo.7122232.

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This article 'Resistance of IR Varieties to Leafhoppers and Planthoppers' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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Velusamy, R., R. Rajendran, and Babu P. C. Sundara. "Resistance of Ir Varieties to Leafhoppers and Planthoppers." International Rice Research Newsletter 11, no. 6 (1986): 12. https://doi.org/10.5281/zenodo.7122001.

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This article 'Resistance of Ir Varieties to Leafhoppers and Planthoppers' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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28

Uloth, Margaret B., Ming Pei You, and Martin J. Barbetti. "Host resistance to Sclerotinia stem rot in historic and current Brassica napus and B. juncea varieties: critical management implications." Crop and Pasture Science 66, no. 8 (2015): 841. http://dx.doi.org/10.1071/cp15064.

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Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum, is an important disease of oilseed brassicas, yet the susceptibility of Australian varieties is unknown. Fifty-five historic, current and potential new Australian canola and mustard varieties were field-screened to determine their relative levels of resistance to SSR. Mean lesion length following stem inoculation with a highly virulent isolate (MBRS1) of the prevailing S. sclerotiorum pathotype (76) ranged from 3.0 mm in the B. napus cultivar Mystic to 202.6 mm (P < 0.001). Three recently developed B. juncea varieties or breedi

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29

Mayer, V., D. Vejchar, and L. Pastorková. "Measurement of potato tubers resistance against mechanical loading." Research in Agricultural Engineering 54, No. 1 (2008): 22–31. http://dx.doi.org/10.17221/708-rae.

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The contribution presents a method for the determination of the potato tubers resistance against mechanical loading, the measurement results obtained with the selected potato varieties, and the comparison of the latter. For testing the potato varieties samples, the method developed in Agrartechnik (ATB) Bornim (Germany) was verified and utilised. The potato samples were exposed to vertical vibrations with adjustable amplitude in the device constructed at the Research Institute of Agricultural Engineering, (RIAE) Prague, for testing tuber samples for mechanical loading. The potato samples cutti

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30

Hu, G. W., J. F. Ma, and J. Tang. "Resistance of Rice Varieties to Whitebacked Planthopper (WBPH) in the Greenhouse." International Rice Research Newsletter 16, no. 6 (1991): 9–10. https://doi.org/10.5281/zenodo.7218571.

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This article 'Resistance of Rice Varieties to Whitebacked Planthopper (WBPH) in the Greenhouse' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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31

GÜNEŞ, Aydın, Mehmet ALPASLAN, Süleyman TABAN, and Ferhan HATİPOĞLU. "Salinity Resistance of Various Wheat Varieties." Turkish Journal of Agriculture and Forestry 21, no. 2 (1997): 165–69. http://dx.doi.org/10.55730/1300-011x.2850.

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32

B, Ganbaatar, and Batbold S. "Drought resistance of spring wheat varieties." Mongolian Journal of Agricultural Sciences 28, no. 03 (2019): 56–60. http://dx.doi.org/10.5564/mjas.v28i03.1301.

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Selection for drought tolerance typically involves evaluating genotypes for either high yield potential or stable performance under drought stress. In order to select drought tolerant varieties of bread wheat an experiment was conducted in a randomized complete block design (RCBD) with two replications during the growing season 2014-2018. Eight drought tolerance indices including stress tolerance index (STI), geometric mean productivity (GMP), mean productivity index (MP), stress susceptibility index (SSI), tolerance index (TOL), yield index (YI), yield stability index (YSI) and drought resist

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33

Gworgwor, NA. "Resistance of sorghum varieties toStriga hermonthica." Tropical Science 43, no. 1 (2003): 48–52. http://dx.doi.org/10.1002/ts.88.

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34

Myroshnychenko, D., and M. Pikovskyi. "Resistance of rose varieties to black spot." Interdepartmental Thematic Scientific Collection of Phytosanitary safety, no. 69 (March 14, 2024): 107–17. https://doi.org/10.36495/phss.2023.69.107-117.

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Goal. To evaluate the resistance of tea-hybrid and floribunda roses to black spot caused by the fungus Diplocarpon rosae F.A. Wolf. (Marssonina rosae (Lib.) Died.). Methods. Laboratory — for diagnosis of the disease and identification of its causative agent. Field — visual assessment of the distribution and degree of development of black spot (on a 6-point scale) on rose varieties under conditions of a natural infectious background. Mathematical and statistical — to assess the reliability of experimental results. Results. The conducted studies show that during the growing seasons of 2022—2023,

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Myroshnychenko, D., and M. Pikovskyi. "Resistance of rose varieties to black spot." Interdepartmental Thematic Scientific Collection of Phytosanitary safety, no. 69 (March 14, 2024): 107–17. http://dx.doi.org/10.36495/1606-9773.2023.69.107-117.

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Goal. To evaluate the resistance of tea-hybrid and floribunda roses to black spot caused by the fungus Diplocarpon rosae F.A. Wolf. (Marssonina rosae (Lib.) Died.). Methods. Laboratory — for diagnosis of the disease and identification of its causative agent. Field — visual assessment of the distribution and degree of development of black spot (on a 6-point scale) on rose varieties under conditions of a natural infectious background. Mathematical and statistical — to assess the reliability of experimental results. Results. The conducted studies show that during the growing seasons o

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36

Fisenko, P. V., N. V. Matsishina, Yu S. Popova, et al. "Study of the structure of potato varieties to <i>Phytophtora infestans</i> (Mont.) de Bary, <i>Synchytrium endobioticum</i> (Schilb.), <i>Globodera pallida</i> (Stone), <i>Globodera rostochiensis</i> (Wollenweber), PVY, PVX in Primorsky Krai." Agrarian science, no. 9 (September 25, 2023): 126–32. http://dx.doi.org/10.32634/0869-8155-2023-374-9-126-132.

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Relevance. One of the important directions of potato breeding is the creation of varieties resistant to a complex of diseases, such as late blight, viral and fungal infections, as well as parasitic nematodes. The use of DNA markers to identify valuable genotypes accelerates the selection process of resistant varieties, thereby increasing the efficiency of breeding.Methods. The aim of the study was to study the resistance of 23 potato varieties to the local isolate Phytophthora infestans (Mont.), as well as to determine the genes of resistance to pathogens: potato cancer, pale and golden cyst-f

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Velusamy, R., Kumar M. Ganesh, Edward Y. S. Thangaraj, and Babu P. C. Sundara. "Resistance to Thrips in Traditional Rice Varieties." International Rice Research Notes 19, no. 2 (1994): 13–14. https://doi.org/10.5281/zenodo.7000909.

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This article 'Resistance to Thrips in Traditional Rice Varieties' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research reported.

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Kalinová, J., and J. Moudrý. "Evaluation of frost resistance in varieties of common buckwheat (Fagopyrum esculentum Moench)." Plant, Soil and Environment 49, No. 9 (2011): 410–13. http://dx.doi.org/10.17221/4145-pse.

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The aim of this study was to determine the most sensitive growth stage of common buckwheat to frost temperatures and evaluate differences in frost resistance among varieties. A&nbsp;modified field-laboratory method was utilised for the study on four varieties of common buckwheat. The lethal temperature (LT50) was determined for all variants. The critical time of frost action (Lt50) was determined for the lethal temperature and for the most sensitive growth stage. Buckwheat is most sensitive to frost temperature from the stage of primary leaves to the stage of two secondary leaves. Differen

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Ma, Zuobin, Lili Wang, Liangkun Zhang, et al. "A Molecular Identification and Resistance Evaluation of the Blast Resistance Genes in Japonica Rice in Northern China." Agronomy 13, no. 10 (2023): 2662. http://dx.doi.org/10.3390/agronomy13102662.

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Rice blast is a fungal disease that seriously threatens rice production. It is of great significance to identify blast resistance genes and clarify their functions in rice varieties. In this study, 11 rice blast resistance genes in 80 Japonica rice varieties in northern China were investigated, including their resistance to rice blast. The results demonstrated that Pita, Ptr, Pib, Pik, and Piks were most widely found, accounting for 48.8, 48.8, 41.3, 20.0, and 18.8% of the tested varieties, respectively. Pi5-G2 at the Pi5 locus and Pik-G5 and Pik-G8 at the Pik locus were also commonly found, a

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Keldysh, М. A., and O. N. Chervyakova. "Immune status of flower-ornamental plants in the collections of the Main Botanical Garden (Viral and Fungal Pathogens)." Pomiculture and small fruits culture in Russia 70 (October 19, 2022): 83–92. http://dx.doi.org/10.31676/2073-4948-2022-70-83-92.

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The article presents the results of studies to assess the resistance of a number of ornamental crops to viral and fungal pathogens. The objects were collections of Phlox L., Paeonia L., Dahlia L.; pathogens of powdery mildew phlox (Erysiphe cichoracearum D. C. f. phlogis Jacz.), cladosporiosis (Cladosporium paeoniae Pass.) and rust (Cronartium fl accidum (Alb. et Schw.) Wint.) peony, dominant viruses in the gene pool of these cultures. As a result of the conducted studies, it was found that the nature of interaction with pathogens at the level of plant varieties and genotypes is realized diffe

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Santoso, Santoso, Anggiani Nasution, and Nani Yunani. "KERAGAMAN DAN SUMBER GEN KETAHANAN VARIETAS PADI LOKAL TERHADAP PATOGEN Pyricularia grisea PENYEBAB PENYAKIT BLAS." Jurnal Ilmu-Ilmu Pertanian Indonesia 22, no. 2 (2020): 119–28. http://dx.doi.org/10.31186/jipi.22.2.119-128.

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[DIVERSITY AND THE SOURCE OF RESISTANCE GENE OF LOCAL RICE VARIETIES ON THE PATHOGENIC OF Pyricularia grisea CAUSE OF BLAST DISEASE]. Local rice varieties are known to have resistance or source of genes to pests even though their productivity yield is low. The pathogen of Pyricularia grisea is a cause of blast disease, which is one of the obstacles in rice production. The research aims to characterize the resistance of local rice varieties to the pathogen of P. grisea and to evaluate the virulence level of P. grisea pathogens against local rice varieties. A total of 100 local rice varieties an

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Martynov, Sergey, and Tatyana Dobrotvorskaya. "Genealogical Analysis of the North-American Spring Wheat Varieties with Different Resistance to Pre-harvest Sprouting." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 70, no. 6 (2016): 370–77. http://dx.doi.org/10.1515/prolas-2016-0057.

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AbstractA comparative analysis of genetic diversity of North American spring wheat varieties differing in resistance to pre-harvest sprouting was carried out. For identification of sources of resistance the genealogical profiles of 148 red-grained and 63 white-grained North-American spring wheat varieties with full pedigrees were calculated and estimates were made of pre-harvest sprouting. The cluster structure of the populations of red-grained and white-grained varieties was estimated. Analysis of variance revealed significant differences between the average contributions of landraces in the

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Magdalena, Koleva. "Pea bacterial blight: resistance." Proceedings College Dobrich XII (March 25, 2022): 78–87. https://doi.org/10.5281/zenodo.6385277.

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Pea bacterial blight is a disease of economic importance to many countries around the world. The use of resistant varieties is the most cost-effective and environmentally friendly method for disease control. Of paramount importance for any breeding program aimed at creating resistant varieties is the search for sources of resistance. This review presents summary information on the genetic control of resistance in pea to bacterial blight pathogens and sources of resistance to the disease in Bulgaria.

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Koleva, Magdalena. "Pea bacterial blight: resistance." Proceedings. College Dobrich XII (October 5, 2023): 78–87. https://doi.org/10.5281/zenodo.8410235.

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Pea bacterial blight is a disease of economic importance to many countries around the world. The use of resistant varieties is the most cost-effective and environmentally friendly method for disease control. Of paramount importance for any breeding program aimed at creating resistant varieties is the search for sources of resistance. This review presents summary information on the genetic control of resistance in pea to bacterial blight pathogens and sources of resistance to the disease in Bulgaria

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Silue, D., and J. L. Notteghem. "Resistance of 99 Oryza glaberrima Steud. Varieties to Blast." International Rice Research Newsletter 16, no. 2 (1991): 13–14. https://doi.org/10.5281/zenodo.7218224.

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This article 'Resistance of 99 Oryza glaberrima Steud. Varieties to Blast' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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Wei, Z. S., and Y. R. Li. "Stability of Bacterial Blight (BB) Resistance in IR Varieties." International Rice Research Newsletter 13, no. 1 (1988): 10–11. https://doi.org/10.5281/zenodo.7128404.

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This article 'Stability of Bacterial Blight (BB) Resistance in IR Varieties' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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Hastuti, D., R. F. Yenny, P. N. Susilawati, and A. P. Welasih. "Resistance of several Banten local rice varieties (Oryza sativa L) towards brown planthopper (Nilaparvata lugens Stal.) attack as potential genetic resources." IOP Conference Series: Earth and Environmental Science 978, no. 1 (2022): 012031. http://dx.doi.org/10.1088/1755-1315/978/1/012031.

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Abstract The purpose of this study was to investigate the genetic resistance of 12 local varieties of rice (Oryza sativa L.) from Lebak, Banten Province, Indonesia to Brown Planthopper (BPH) (Nilaparvata lugens Stal.). The DNA amplification of PCR with SSR marker was analyzed by scaling the emerging tape and the allele size on the associated marker by using the gel analizer software and determined the percentage of polymorphism by calculating the total of polymorphic alleles in each primer. Datas were also analyzed in relation of plant familiarity patterns by using NTSys software to determine

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Tsetskladze, Ts, Z. Sikharulidze, M. Muradashvili, and K. Sikharulidze. "Screening of tomato varieties for resistance to major fungal diseases and bacterial wilt." Interdepartmental Thematic Scientific Collection of Plant Protection and Quarantine, no. 64 (November 19, 2018): 268–73. http://dx.doi.org/10.36495/1606-9773.2018.64.268-273.

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The resistance of local and introduced tomato varieties to early blight (Alternaria solani Sorauer) and late blight (Phytopthora infestans (Mont.) de Bary) were evaluated in the field and to bacterial wilt (Ralstonia solanacearum) were tested under artificial infection in greenhouse conditions. Three varieties (De-brao krasnii, De-brao Rozovii and Sultan F1) showed the moderate resistance to early blight, while the only two varieties (De-brao krasnii and De-brao Rozovii) were moderate resistant to late blight. The remaining samples showed susceptibility to disease. The tested varieties s

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Qi, Zhongqiang, Yan Du, Junjie Yu, et al. "Molecular Detection and Analysis of Blast Resistance Genes in Rice Main Varieties in Jiangsu Province, China." Agronomy 13, no. 1 (2023): 157. http://dx.doi.org/10.3390/agronomy13010157.

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Rice blast, caused by Pyricularia oryzae, is one of the most destructive rice diseases worldwide. Using resistant rice varieties is the most cost-effective way to control the disease, and it is crucial to analyze the resistance level and the resistance genes distribution of the main varieties. In this study, we collected 119 rice main varieties in Jiangsu province and evaluated the resistance to leaf and panicle blast and found that indica rice was more resistant to rice blast than japonica rice. Moreover, we detected the distribution of 14 resistance genes (R genes) in the 119 varieties. The

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Derova, Т. G., N. V. Shishkin, and О. S. Kononenko. "New sources of powdery mildew resistance among winter bread wheat for adjusting the breeding immunological programs in the Agricultural Research Center “Donskoy”." Grain Economy of Russia, no. 3 (July 8, 2021): 82–87. http://dx.doi.org/10.31367/2079-8725-2021-75-3-82-87.

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Systematic work on the development of winter wheat varieties possessing resistance to a complex of the most harmful diseases has been carried out in the Agricultural Research Center “Donskoy” since the early 1970s. During this period, there has been created a large number of varieties that possess resistance to 3–4 diseases in conditions of infectious backgrounds of pathogens. Due to the analysis of varieties, there was identified a small number of varieties resistant to powdery mildew. Powdery mildew, caused by the fungus Blumeria graminis (DC) Speer, annually occurs on wheat, affecting all a

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