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GrainGenes Reference Report: TAG-133-857

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Reference
TAG-133-857
Title
QTL mapping for grain yield-related traits in bread wheat via SNP-based selective genotyping
Journal
Theoretical and Applied Genetics
Year
2020
Volume
133
Pages
857-872
Author
Yang L
[ Show all 10 ]
Abstract
Identification of major stable quantitative trait loci (QTL) for grain yield-related traits is important for yield potential improvement in wheat breeding. In the present study, 266 recombinant inbred lines (RILs) derived from a cross between Zhongmai 871 (ZM871) and its sister line Zhongmai 895 (ZM895) were evaluated for thousand grain weight (TGW), grain length (GL), grain width (GW), and grain number per spike (GNS) in 10 environments and for grain filling rate in six environments. Sixty RILs, with 30 higher and 30 lower TGW, respectively, were genotyped using the wheat 660 K SNP array for preliminary QTL mapping. Four genetic regions on chromosomes 1AL, 2BS, 3AL, and 5B were identified to have a significant effect on TGW-related traits. A set of Kompetitive Allele Specific PCR markers were converted from the SNP markers on the above target chromosomes and used to genotype all 266 RILs. The mapping results confirmed the QTL named Qgw.caas-1AL, Qgl.caas-3AL, Qtgw.caas-5B, and Qgl.caas-5BS on the targeted chromosomes, explaining 5.0 - 20.6%, 5.7 - 15.7%, 5.5 - 17.3%, and 12.5 - 20.5% of the phenotypic variation for GW, GL, TGW, and GL, respectively. A novel major QTL for GNS on chromosome 5BS, explaining 5.2 - 15.2% of the phenotypic variation, was identified across eight environments. These QTL were further validated using BC1F4 populations derived from backcrosses ZM871/ZM895//ZM871 (121 lines) and ZM871/ZM895//ZM895 (175 lines) and 186 advanced breeding lines. Collectively, selective genotyping is a simple, economic, and effective approach for rapid QTL mapping and can be generally applied to genetic mapping studies for important agronomic traits.
External Databases
https://doi.org/10.1007/s00122-019-03511-0
Germplasm
Zhongmai 871
Zhongmai 895
Locus
Kasp_1A10
[ Show all 26 ]
Map Data
Wheat-2019-KASP_YldQTL
Probe
Kasp_1A10
[ Show all 26 ]
QTL
Qtgw.caas-1AL
[ Show all 15 ]

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