Articles de revues : « Lgy11 »

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Spjut, Lina. « En läroplansanalys om samstämmighet inom Lgr11 ». Educare - vetenskapliga skrifter, n^o 3 (24 mai 2021) : 102–29. http://dx.doi.org/10.24834/educare.2021.3.5.

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This article investigates in what way the Swedish compulsory school curriculum (Lgr11) addresses knowledge regarding Swedish national minorities. The aim is to study alignment within Lgr11 through a case of the theme national minorities. Research questions target alignment within syllabi and alignment between syllabi and the aim and guidelines in the curricula. Theories of alignment and curriculum theory formed the theory and methodology for the analysis, foregrounding similarities and differences in how Swedish national minorities are addressed in Lgr11. Results show numerous inconsistencies. Learning goals in curriculum and syllabus content are, for instance, not aligned, and differences exist within the syllabus between aim (syfte), central content (centralt innehåll) and the lower set measurable demands (kunskapskrav). This is problematic since earlier research demonstrated that measurable demands have out-conquered teaching content. These challenges for teacher’s interpretation of curricula and syllabus can affect the teaching content.

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Iversen, Maja W., Øyvind Nordbø, Eli Gjerlaug-Enger, Eli Grindflek et Theodorus H. E. Meuwissen. « Predicting survival and longevity of sows using purebred and crossbred data1 ». Translational Animal Science 4, n^o 2 (1 avril 2020) : 993–1005. http://dx.doi.org/10.1093/tas/txaa073.

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Abstract Survival and longevity are very important traits in pig breeding. From an economic standpoint, it is favorable to keep the sows for another parity instead of replacing them and, from the animal’s perspective, better welfare is achieved if they do not experience health problems. It is challenging to record longevity in purebred (PB) nucleus herds because animals are more likely to be replaced based on breeding value and high replacement rates rather than inability to produce. Crossbred (CB) sows are, however, submitted to lower replacement rates and are more likely to be kept in the farm longer if they can produce large and robust litters. Therefore, the objective of this study was to investigate whether the use of CB phenotypes could improve prediction accuracy of longevity for PBs. In addition, a new definition of survival was investigated. The analyzed data included phenotypes from two PB dam lines and their F1 cross. Three traits were evaluated: 1) whether or not the sow got inseminated for a second litter within 85 d of first farrowing (Longevity 1–2), 2) how many litters the sow can produce within 570 d of first farrowing [Longevity 1–5 (LGY15)], and 3) a repeatability trait that indicates whether or not the sow survived until the next parity (Survival). Traits were evaluated both as the same across breeds and as different between breeds. Results indicated that longevity is not the same trait in PB and CB animals (low genetic correlation). In addition, there were differences between the two PB lines in terms of which trait definition gave the greatest prediction accuracy. The repeatability trait (Survival) gave the greatest prediction accuracy for breed B, but LGY15 gave the greatest prediction accuracy for breed A. Prediction accuracy for CBs was generally poor. The Survival trait is recorded earlier in life than LGY15 and seemed to give a greater prediction accuracy for young animals than LGY15 (until own phenotype was available). Thus, for selection of young animals for breeding, Survival would be the preferred trait definition. In addition, results indicated that lots of data were needed to get accurate estimates of breeding values and that, if CB performance is the breeding goal, CB phenotypes should be used in the genetic evaluation.

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Gowda, Vasantha, Michal Biler, Andrei Filippov, Malisa V. Mantonico, Eirini Ornithopoulou, Mathieu Linares, Oleg N. Antzutkin et Christofer Lendel. « Structural characterisation of amyloid-like fibrils formed by an amyloidogenic peptide segment of β-lactoglobulin ». RSC Advances 11, n^o 45 (2021) : 27868–79. http://dx.doi.org/10.1039/d1ra03575d.

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Lundström, Stefan, Lena Manderstedt et Annbritt Palo. « Den mätbara litteraturläsaren - En tendens i Lgr11 och en konsekvens för svensklärarutbildningen ». Utbildning & ; Demokrati – tidskrift för didaktik och utbildningspolitk 20, n^o 2 (1 janvier 2011) : 7–26. http://dx.doi.org/10.48059/uod.v20i2.948.

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Lunde, Torodd. « Skolans laborationer och traditionens makt ». Venue 4, n^o 3 (2 novembre 2015) : 1–4. http://dx.doi.org/10.3384/venue.2001-788x.15421.

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Traditioner har makt över hur vi tänker. När vi nu enligt nya läroplanen Lgr11 ska börja genomföra laborationer i syftet att ge eleverna kunskaper om den naturvetenskapliga forskningsprocessen, finns stor sannolikhet att uppdraget påverkas av den laborationstradition som redan finns. Det visar en fallstudie där samtliga högstadielärare i NO-ämnen inom en kommun deltog. Därför behövs nya laborationer som gynnar det kritiska tänkandet.

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Zhao, Jiang, Bo Li, Heng Zhao, Yi Hu, Wenjin Wang et Youqing Wang. « Tight focusing properties of the azimuthal discrete phase modulated radially polarized LG11⁎ beam ». Optics Communications 296 (juin 2013) : 95–100. http://dx.doi.org/10.1016/j.optcom.2013.01.033.

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Piepoli, Tiziana, Cemile Jakupoglu, Wenli Gu, Elena Lualdi, Blanca Suarez-Merino, Pietro L. Poliani, Maria Grazia Cattaneo et al. « Expression studies in gliomas and glial cells do not support a tumor suppressor role for LGI11 ». Neuro-Oncology 8, n^o 2 (1 avril 2006) : 96–108. http://dx.doi.org/10.1215/15228517-2005-006.

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Kongjaimun, Alisa, Akito Kaga, Norihiko Tomooka, Prakit Somta, Takehiko Shimizu, Yujian Shu, Takehisa Isemura, Duncan A. Vaughan et Peerasak Srinives. « An SSR-based linkage map of yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) and QTL analysis of pod length ». Genome 55, n^o 2 (février 2012) : 81–92. http://dx.doi.org/10.1139/g11-078.

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Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a BC1F1 ((JP81610 × TVnu457) × JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genotype. The markers on LG11 were also distorted in the rice bean (Vigna umbellata (Thunb.) Ohwi & Ohashi) map, suggesting the presence of common segregation distortion factors in Vigna species on this LG. One major and six minor QTLs were identified for pod length variation between yardlong bean and wild cowpea. Using flanking markers, six of the seven QTLs were confirmed in an F2 population of JP81610 × TVnu457. The molecular linkage map developed and markers linked to pod length QTLs would be potentially useful for yardlong bean and cowpea breeding.

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Zhang, Quan, Junjie Yu, Biran Shi, Fanchun Tang et Jianlang Li. « LG11-mode vortex Nd:YAG laser by applying second-order circular Dammann grating for annular pumping ». Chinese Optics Letters 17, n^o 5 (2019) : 051402. http://dx.doi.org/10.3788/col201917.051402.

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Berliner, Howard S. « The Crisis of the Los Angeles County Public Hospital System : A Harbinger for the Nation ». International Journal of Health Services 34, n^o 2 (avril 2004) : 313–22. http://dx.doi.org/10.2190/gtv0-lgy1-c2lk-brq7.

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Arul Teen, Y. P., T. Nathiyaa, K. B. Rajesh, V. Ravi et T. V. S. Pillaie. « Effect of tilt and astigmatism aberration of turbulent atmosphere on the intensity distributions of a LG11 beam ». Optik 125, n^o 19 (octobre 2014) : 5780–84. http://dx.doi.org/10.1016/j.ijleo.2014.07.014.

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Lunde, Torodd, Carl-Johan Rundgren et Shu-Nu Chang Rundgren. « När läroplan och tradition möts – hur högstadielärare bemöter yttre förväntningar på undersökande arbete i naturämnesundervisningenHow lower secondary science teachers meet external expectations on inquiry-based science teaching ». Nordic Studies in Science Education 11, n^o 1 (23 mars 2015) : 88–101. http://dx.doi.org/10.5617/nordina.783.

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The current Swedish curricula for compulsory school (Lgr11) emphasize inquiry-based science teaching to develop pupils’ critical thinking while the Swedish laboratory teaching tradition emphasize laboratory work to promote students’ conceptual understanding. The aim of this study is to illuminate how a group of teachers within the Swedish teaching tradition, based on the prevailing condition, met the external expectations of involving pupils in inquiry-based science teaching. During a teacher professional development program, the entire group of lower secondary science teachers within a school district, twelve in total, participated in group reflections about own inquiry activities. The results indicated that teachers, despite shortage of activities, wanted to involve pupils in inquiry-based science teaching to meet the curricula’s and national tests’ request for such activities. The teachers did this through hybridization, in which the teachers opened up and transformed existing laboratory activities; and by imitation, in which they imitated how investigative inquiry is carried out on national tests. Inquiry-based science teaching, as it emerges in this study, possessed several characteristics might limiting the potential for pupils to develop an understanding functional for critical thinking in private- and public lives.

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Hull, Mark R., Stephen P. Long et Leland S. Jahnke. « Instantaneous and Developmental Effects of Low Temperature on the Catalytic Properties of Antioxidant Enzymes in Two Zea Species ». Functional Plant Biology 24, n^o 3 (1997) : 337. http://dx.doi.org/10.1071/pp96041.

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When Zea mays cv. LG11 plants were grown 14˚C(close to the lower thermal limit for leaf expansion), three of the five enzymes of the active oxygen scavenging cycle (Halliwell-Asada Pathway) showed changes in total leaf activity compared with growth at 25˚C. Two of theseenzymes, ascorbate peroxidase (APX) and glutathione reductase (GTR), were selected for further investigation. The effects of assay temperature on threekinetic parameters (Vmax,Km,Vmax/Km) were determined inextracts from Z. mays and compared with extracts fromits low temperature tolerant relative, Z. diploperennisIltis, Doebley & Guzman. The kinetic power(Vmax/Km) was determinedbecause the Km alone may not be a useful predictor of anenzyme’s effectiveness in situ. The decrease inthe kinetic power of APX on lowering the temperature to 5ºC was muchsmaller in Z. diploperennis thaninZ. mays. This suggests that theZ. diploperennis APX is better able to removeH2O2 at severely reducedtemperatures than is APX from Z. mays.Z. diploperennis had a twofold greater ascorbate poolthan the chilling-susceptible Z. mays. Only minordifferences were seen in the kinetic properties of GTR and the size of theglutathione pool between the genotypes.

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Soufflet-Freslon, V., L. Gianfranceschi, A. Patocchi et C. E. Durel. « Inheritance studies of apple scab resistance and identification of Rvi14, a new major gene that acts together with other broad-spectrum QTL ». Genome 51, n^o 8 (août 2008) : 657–67. http://dx.doi.org/10.1139/g08-046.

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Scab, caused by the fungal pathogen Venturia inaequalis , is the most common disease of cultivated apple (Malus ×domestica). The fungal races 6 and 7 have now overcome the major resistance gene Vf, which is widely used in apple breeding programmes. New breeding strategies to achieve durable resistance are thus necessary. The aim of this study was to determine the genetic basis of quantitative resistance of the apple cultivar ‘Dülmener Rosenapfel’, known to be scab resistant under different environmental conditions. An F1 progeny derived from the cross between the susceptible cultivar ‘Gala’ and ‘Dülmener Rosenapfel’ was tested in a greenhouse with a multi-isolate inoculum of V. inaequalis. Rvi14, a new major gene that conditions a chlorotic-type reaction, was mapped on linkage group (LG) 6 in a genomic region not known to be involved in disease resistance. A further three quantitative trait loci (QTL) for resistance were identified. One co-localized with Rvi14 on LG6, whereas the remaining two were detected on LG11 and LG17, in genomic regions already reported to carry broad-spectrum QTL in other genetic backgrounds. Since a selective genotyping approach was used to detect QTL, an expectation-maximization (EM) computation was used to estimate the corrected QTL contributions to phenotypic variation and was validated by entire progeny genotyping.

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Xu, Fangtao, Rong Zhou, Senouwa Segla Koffi Dossou, Shengnan Song et Linhai Wang. « Fine Mapping of a Major Pleiotropic QTL Associated with Sesamin and Sesamolin Variation in Sesame (Sesamum indicum L.) ». Plants 10, n^o 7 (30 juin 2021) : 1343. http://dx.doi.org/10.3390/plants10071343.

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Deciphering the genetic basis of quantitative agronomic traits is a prerequisite for their improvement. Herein, we identified loci governing the main sesame lignans, sesamin and sesamolin variation in a recombinant inbred lines (RILs, F8) population under two environments. The content of the two lignans in the seeds was investigated by HPLC. The sesamin and sesamolin contents ranged from 0.33 to 7.52 mg/g and 0.36 to 2.70 mg/g, respectively. In total, we revealed 26 QTLs on a linkage map comprising 424 SSR markers, including 16 and 10 loci associated with sesamin and sesamolin variation, respectively. Among them, qSmin_11.1 and qSmol_11.1 detected in both the two environments explained 67.69% and 46.05% of the phenotypic variation of sesamin and sesamolin, respectively. Notably, qSmin11-1 and qSmol11-1 were located in the same interval of 127-127.21cM on LG11 between markers ZMM1776 and ZM918 and acted as a pleiotropic locus. Furthermore, two potential candidate genes (SIN_1005755 and SIN_1005756) at the same locus were identified based on comparative transcriptome analysis. Our results suggest the existence of a single gene of large effect that controls expression, both of sesamin and sesamolin, and provide genetic information for further investigation of the regulation of lignan biosynthesis in sesame.

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Nordholm, Daniel. « State policy directives and middle-tier translation in a Swedish example ». Journal of Educational Administration 54, n^o 4 (4 juillet 2016) : 393–408. http://dx.doi.org/10.1108/jea-05-2015-0036.

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Purpose – The purpose of this paper is to analyse the Swedish National Agency for Education’s launch of the nationwide Lgr11 curriculum reform and how local education authorities (LEAs) in one municipality translated and responded to the National Agency’s directives. Design/methodology/approach – This paper presents empirical data from a qualitative study of documents and interviews using the analytical perspective from Scott (2001, 2008) to explore regulative, normative and cultural-cognitive aspects of the National Agency’s communications. To analyse the local translations made by LEAs at the central municipal level, analytical categories of assimilation, loose coupling and transformation were used. Findings – The overall results show that the National Agency primarily communicated its policy instructions to LEAs using normative and cultural-cognitive arguments and directives. The lack of sharper regulative directives, such as for division of labour, decision making, mandates and developmental roles, reduced the potential for LEAs to become influential actors in organising local implementation. An analysis using the assistance of assimilation categories, loose coupling and transformation of the paper also shows that LEAs need system support to accomplish more innovative middle-tier translations through elements of loose coupling and transformation – to become catalysts for school system improvement. Research limitations/implications – The research is designed to understand actions and interpretations within specific institutional, organisational and social settings. Originality/value – This paper contributes to former findings by offering a novel perspective for understanding policy translation and the role of middle-tier intermediaries in decentralised education systems.

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Louwerse, W., L. Sibma et J. van Kleef. « Crop photosynthesis, respiration and dry matter production of maize. » Netherlands Journal of Agricultural Science 38, n^o 2 (1 juin 1990) : 95–108. http://dx.doi.org/10.18174/njas.v38i2.16597.

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Aboveground net photosynthesis and respiration of maize cv. LG11 was determined in the field between mid-June and end-Oct. at regular intervals (1-2 weeks) at 12.5 and 22.5 degrees C by measuring the CO2 uptake or release in mobile crop enclosures. The actual growth rate of the crop was determined from fortnightly harvests. Temp. dependence of photosynthesis was highest in the early (until mid-July) and very late (early Oct.) stages of crop growth, showing a reduction of about 50% at the higher irradiances (>400 W/msuperscript 2). In the period of major DM production (mid-July to Sep.) the reduction was only 12-15%. Assuming maintenance respiration to become constant for cobs and grain exceeding a yield of 1000 kg/ha and for stems exceeding 2500 kg/ha, the measured and calculated dark respiration at 22.5 degrees matched fairly well. At 12.5 degrees the calculation, using the same assumptions, significantly overestimated dark respiration during the first part of the growing period. The carbon balance sheet showed that from the total amount of CO2 absorbed by the crop (equivalent to 30.7 t DM/ha), 30% was lost by aboveground respiration and 50% was invested in aboveground harvestable material. The remaining 20% was assumed to be transported to plant parts below ground. Substantial losses of DM at the end of the growing season did not occur. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Fazio, Gennaro, Yizhen Wan, Dariusz Kviklys, Leticia Romero, Richard Adams, David Strickland et Terence Robinson. « Dw2, a New Dwarfing Locus in Apple Rootstocks and Its Relationship to Induction of Early Bearing in Apple Scions ». Journal of the American Society for Horticultural Science 139, n^o 2 (mars 2014) : 87–98. http://dx.doi.org/10.21273/jashs.139.2.87.

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The ability of certain apple rootstocks to dwarf their scions has been known for centuries and their use revolutionized apple (Malus ×domestica) production systems. In this investigation, several apple rootstock breeding populations, planted in multiple replicated field and pot experiments, were used to ascertain the degree of dwarfing when grafted with multiple scions. A previous genetic map of a breeding population derived from parents ‘Ottawa 3’ (O.3) and ‘Robusta 5’ (R5) was used for quantitative trait locus (QTL) analysis of traits related to scion vigor suppression, induction of early bearing, and other tree size measurements on own-rooted and grafted trees. The analysis confirmed a previously reported QTL that imparts vigor control [Dw1, log of odds (LOD) = 7.2] on linkage group (LG) 5 and a new QTL named Dw2 (LOD = 6.4) on LG11 that has a similar effect on vigor. The data from this population were used to study the interaction of these two loci. To validate these findings, a new genetic map comprised of 1841 single-nucleotide polymorphisms was constructed from a cross of the dwarfing, precocious rootstocks ‘Geneva 935’ (G.935) and ‘Budagovsky 9’ (B.9), resulting in the confirmation and modeling of the effect of Dw1 and Dw2 on vigor control of apple scions. Flower density and fruit yield data allowed the identification of genetic factors Eb1 (LOD = 7.1) and Eb2 (LOD = 7.6) that cause early bearing of scions, roughly colocated with the dwarfing factors. The major QTL for mean number of fruit produced per tree colocated with Dw2 (LOD = 7.0) and a minor QTL was located on LG16 (LOD = 3.5). These findings will aid the development of a marker-assisted breeding strategy, and the discovery of additional sources for dwarfing and predictive modeling of new apple rootstocks in the Geneva® apple rootstock breeding program.

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Schop, Roelandt F. J., Catherine Mancini, Wee-Joo Chng, Renee C. Tschumper, Diane F. Jelinek, Neil E. Kay, Peter Leif Bergsagel, John D. Carpten et Rafael Fonseca. « High Density Oligonucleotide Array CGH Analysis of CLL Reveals Areas of Recurrent Genomic Gain or Loss. » Blood 108, n^o 11 (1 novembre 2006) : 2093. http://dx.doi.org/10.1182/blood.v108.11.2093.2093.

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Abstract The study of genomic aberrations in chronic lymphocytic leukemia (CLL) has yielded critical information, now routinely used for the prognostication of patients. An unbiased search for genome wide areas of copy number change is needed to identify possible primary genetic events in CLL and to elucidate their relationship to other known cytogenetic factors, such as deletions of 13q14, 11q23 and 17p13 and trisomy 12. Here we report on a study where we used a 60-mer oligo array-based Comparative Genomic Hybridization (aCGH, 44B platform from Agilent Technologies, Palo Alto, CA). We observed the most common genetic aberrations in CLL and in similar frequencies as would be predicted for CLL (e.g. 44% showing deletions of chromosome 13q14). Among those patients, 45% had no apparent other aberration. Of great interest, small bi-allelic deletions of chromosome 13, which predominantly involved the DLEU1 and DLEU2 locus, were detected in 4 patients (16%). Deletions of 11q23 were observed in 6 cases (24%), and while some involved the ATM locus one did not, casting doubt on the precise gene deregulated by these deletions. Large deletions of the whole 17p-arm were detected in three cases (12%). Trisomy 12 was present in only two cases (8%). No other trisomies were detected and also small regions of copy gain were uncommon. Monosomy of chromosomes 19, X and Y were present in three separate cases. Large deletions of chromosome 2p were seen in two cases, but an additional case had a small deletion involving the ALK gene. This case also had a breakpoint at chromosome 5 involving the NMP1 locus, suggestive of a t(2;5). A recent study (Mayr et al., Blood 2006) indicates that chromosomal translocations in CLL are present in 33% and were associated with a dismal prognosis. In our analysis we detected several breakpoints indicative of translocations. Detailed study is necessary to elucidate possible molecular events associated with these translocations. Other small regions of DNA copy loss were found at several locations throughout the genome. Regions of interest are shown in the table. In summary we show that multiple areas of recurrent genomic gain and loss can be identified in clonal cells of CLL and should lead to further insights into the understanding of disease pathogenesis. Chromosome Location Gene(s) of interest Loss 6q24.3 LATS Loss 10q23.3 LG11 Loss 10q24.2 PAX2, WNT8B, TLX1, POLL, NFKB2 Loss 11p15.4 PPFIBP2 Loss 12p13 TNFRSF1A and 7 Loss 15q22.1 TCF12 Loss 19p13.3 BAX, RUVBL2 Loss 20q11.2 TP53INP2 Loss 20q13.1 WFDC13

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Mathew, Bijo, Chonny Herrera-Acevedo, Sanal Dev, T. M. Rangarajan, Mohamed Saheer Kuruniyan, Naseef Punnoth Poonkuzhi, Luciana Scotti et Marcus Tullius Scotti. « Development of 2D, 3D-QSAR and Pharmacophore Modeling of Chalcones for the Inhibition of Monoamine Oxidase B ». Combinatorial Chemistry & ; High Throughput Screening 24 (16 août 2021). http://dx.doi.org/10.2174/1386207324666210816125738.

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Background: Selective and reversible types of MAO-B inhibitors have emerged as promising candidates for the management of neurodegenerative diseases. Several functionalized chalcone derivatives were shown to have potential reversible MAO-B inhibitory activity, which have recently been reported from our laboratory. Methods: With the experimental results of about 70 chalcone derivatives, we further developed a pharmacophore modelling, and 2D and 3D- QSAR analyses of these reported chalcones for MAO-B inhibition. Results: The 2D-QSAR model presented four variables (MATS7v, GATS 1i and 3i, and C-006) from 143 Dragon 7 molecular descriptors, with a r2 value of 0.76 and a Q2cv for cross-validation equal to 0.72. An external validation also was performed using 11 chalcones, obtaining a Q2ext value of 0.74. The second 3D-QSAR model using MLR (multiple linear regression) was built starting from 128 Volsurf+ molecular descriptors, being identified as 4 variables (Molecular descriptors): D3, CW1 and LgS11, and L2LGS. Adetermination coefficient (r2) value of 0.76 and a Q2cv for cross-validation equal to 0.72 were obtained for this model. An external validation also was performed using 11 chalcones and a Q2ext value of 0.74 was found. Conclusion: This report exhibited a good correlation and satisfactory agreement between experiment and theory.

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Du, Hua, Haiyang Zhang, Libin Wei, Chun Li, Yinghui Duan et Huili Wang. « A high-density genetic map constructed using specific length amplified fragment (SLAF) sequencing and QTL mapping of seed-related traits in sesame (Sesamum indicum L.) ». BMC Plant Biology 19, n^o 1 (décembre 2019). http://dx.doi.org/10.1186/s12870-019-2172-5.

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Abstract Background Sesame (Sesamum indicum L., 2n = 2x = 26) is an important oilseed crop with high oil content but small seed size. To reveal the genetic loci of the quantitative seed-related traits, we constructed a high-density single nucleotide polymorphism (SNP) linkage map of an F2 population by using specific length amplified fragment (SLAF) technique and determined the quantitative trait loci (QTLs) of seed-related traits for sesame based on the phenotypes of F3 progeny. Results The genetic map comprised 2159 SNP markers distributed on 13 linkage groups (LGs) and was 2128.51 cM in length, with an average distance of 0.99 cM between adjacent markers. QTL mapping revealed 19 major-effect QTLs with the phenotypic effect (R2) more than 10%, i.e., eight QTLs for seed coat color, nine QTLs for seed size, and two QTLs for 1000-seed weight (TSW), using composite interval mapping method. Particularly, LG04 and LG11 contained collocated QTL regions for the seed coat color and seed size traits, respectively, based on their close or identical locations. In total, 155 candidate genes for seed coat color, 22 for seed size traits, and 54 for TSW were screened and analyzed. Conclusions This report presents the first QTL mapping of seed-related traits in sesame using an F2 population. The results reveal the location of specific markers associated with seed-related traits in sesame and provide the basis for further seed quality traits research.

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« Genetic control of the color of ray flowers in sunflower mutant lines ». Journal of V. N. Karazin Kharkiv National University, Series "Biology", n^o 33 (2019). http://dx.doi.org/10.26565/2075-5457-2019-33-3.

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Sunflower (Hellianthus annuus L.) inflorescences have flowers of various shapes, role and colors. The aim of our work was to study genetic identification of new sources of light types of colors and genetic control of traits. The mutant MV4 was crossed with the lines, which had a yellow color of ray flowers. In the second generation, segregation of colors was obtained, which corresponds to the ratio 3 yellow to 1 light. This indicates monogenic recessive control of the trait of light color. To identify the gene that caused the light color, the mutant MV4 was crossed with the line: KG108 (“su” gene – sulfurous color), BA1B (“ly” gene – light yellow color), and KG107 (“l” gene – lemon color). In the KG108 × MV4 crossing combination, the first and second generation hybrids had a light color that was not visually different from the parents. This testifies to the identity of the genetic control of the trait sulfurous coloration in lines KG105 and MV4. In the crossings MV4 × BA1 and MV4 × KG107 usual yellow coloration of the ray flowers was obtained in the first generation. In the second generation of MV4 × BA1 combination, splitting of colors of ray flowers with a ratio of 9 yellow to 7 light yellow was observed. This ratio indicates the presence of two separate genes that control these types of color. In the second generation of MV4 × KG107 combination, four classes of plants were observed in the coloration of ray flowers: yellow, orange, light and light orange. Splitting reliably corresponded to a ratio of 9 : 3 : 3 : 1. This confirms the independent control of two colors by different genes with complementary interaction. Mutant MV5 with lemon-colored ray flowers was crossed with the line LVO7, the plants of which have the usual yellow color of ray flowers. In the first generation, hybrid plants were obtained with the usual yellow color of ray flowers. In the second generation, splitting into two classes was observed: with yellow and lemon colors of flowers. This confirms the hypothesis of a monogenic recessive control of the trait of lemon coloration of ray flowers of sunflower in MV5 line. Crossings of lines with lemon coloration was carried out, where the mother component was the line ZL678, and the father ones: MV5, Temp234, КГ107, LG11-2, Sl2349, I4RHA274. In all descendants, only lemon coloration of ray flowers was observed, which indicates the same genetic control of the trait by the gene “l”.

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Articles de revues sur le sujet « Lgy11 »

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