scholarly journals Identification of QTLs for resistance to leaf and stem rusts in bread wheat (Triticum aestivum L.) using a mapping population of ‘Pamyati Azieva × Paragon’

2019 ◽  
Vol 23 (7) ◽  
pp. 887-895 ◽  
Author(s):  
Y. Genievskaya ◽  
Y. Fedorenko ◽  
A. Sarbayev ◽  
A. Amalova ◽  
S. Abugalieva ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Mapping Population ◽  
Recombinant Inbred Lines ◽  
Snp Array ◽  
Initial Step ◽  
Triticum Aestivum L ◽  
Field Trials ◽  
Snp Markers ◽  
The North

Leaf rust (LR) and stem rust (SR) are harmful fungal diseases of bread wheat (Triticum aestivum L.). The purpose of this study was to identify QTLs for resistance to LR and SR that are effective in two wheat-growing regions of Kazakhstan. To accomplish this task, a population of recombinant inbred lines (RILs) of ‘Pamyati Azieva × Paragon’ was grown in the northern and southeastern parts of Kazakhstan, phenotyped for LR/SR severities, and analyzed for key yield components. The study revealed a negative correlation between disease severity and plant productivity in both areas. The mapping population was genotyped using a 20,000 Illumina SNP array. A total of 4595 polymorphic SNP markers were further selected for linkage analysis after filtering based on missing data percentage and segregation distortion. Windows QTL Cartographer was applied to identify QTLs associated with LR and SR resistances in the RIL mapping population studied. Two QTLs for LR resistance and eight for SR resistance were found in the north, and the genetic positions of eight of them have matched the positions of the known Lr and Sr genes, while two QTLs for SR were novel. In the southeast, eight QTLs for LR and one for SR were identified in total. The study is an initial step of the genetic mapping of LR and SR resistance loci of bread wheat in Kazakhstan. Field trials in two areas of the country and the genotyping of the selected mapping population have allowed identification of key QTLs that will be effective in regional breeding projects for better bread wheat productivity.

scholarly journals Screening of recombinant inbred lines for salinity tolerance in bread wheat (Triticum aestivum L.)

2011 ◽  
Vol 10 (60) ◽  
pp. 12875-12881 ◽  
Author(s):  
Azadi Amin ◽  
Majidi Hervan Eslam ◽  
Abolghasem Mohammadi Seyed ◽  
Moradi Foad ◽  
Nakhoda Babak ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Salinity Tolerance ◽  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Triticum Aestivum L ◽  
Inbred Lines

scholarly journals Hybride necrosis genes in bread wheat varieties (Triticum aestivum L.) of Ukraine

2018 ◽  
Vol 23 ◽  
pp. 46-51
Author(s):  
A. V. Galaev ◽  
M. V. Galaeva
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Premature Death ◽  
Triticum Aestivum L ◽  
Microsatellite Analysis ◽  
Hybrid Necrosis ◽  
Wheat Varieties ◽  
Complementary Genes ◽  
The North ◽  
Adaptive Value

Hybrid necrosis is the gradual premature death of leaves or plants in certain F1-2hybrids of wheat (Triticum aestivum L.), and it is caused by the interaction of two dominant complementary genes Ne1 and Ne2 located on chromosome arms 5BL and 2BS, respectively. To date, necrotic genotypes in most varieties of Ukrainian breeding have not been identified. Aim. This study was conducted to determine the necrotic genotypes in varieties Ukrainian breeding of different regions. Methods. Microsatellite analysis, PAAgel-electrophoresis. Results. 150 genotypes of bread wheat varieties from Ukrainian breeding were identified by loci Xbarc74-5В and Xbarc55-2В closely linked to hybrid necrosis genes Ne1 and Ne2, respectively. Conclusions. The most common in the South of Ukraine is the genotypes Ne1wNe2w/m and Ne1mNe2w/m were revealed. The most of varieties in the North of Ukraine had the genotypes ne1Ne2ms. These genotypes can have breeding and adaptive value for specific geographical conditions. Keywords: Triticum aestivum L., hybride necrosis genes Ne1 and Ne2, microsatellite analysis.

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