作物学报Issue(3)：349-358,10.DOI:10.3724/SP.J.1006.2015.00349
燕大1817/北农6号重组自交系群体穗部性状的QTL定位
Mapping Quantitative Trait Loci Related to Spike Traits Using a RILs Popula-tion of Yanda 1817 × Beinong 6 in Wheat (Triticum aestivum L.)
摘要
Abstract
Spike length (SL), grain number per spike (GNS), and grain weight per spike (GWS) are important spike traits associ-ated with yield in wheat. In this study, quantitative trait loci (QTLs) for spike traits were mapped using an available high-density SNP and SSR genetic linkage map developed from a recombinant inbred line (RIL) population of Yanda 1817 × Beinong 6. Using phenotypic data on two locations (Beijing and Shijiazhuang) in two years (2011–2012 and 2012–2013 growing seasons), 29 QTLs for SL, GNS and GWS were detected by inclusive composite interval mapping (ICIM) (LOD≥ 2.5). Among which, 10 QTLs for spike length were mapped on chromosomes 1B, 2D, 3A, 3B, 4A, 5A, 5B, 6A, and 7D with phenotypic variations ranging from 2.96% to 9.63%. A stable and major QTL associated with SL, QSl.cau-4A.2, was detected in all the environments with phenotypic variations ranging from 5.89% to 9.62%. Eight QTLs for GNS were found on chromosomes 1A, 3A, 3D, 4A, and 5B with pheno-typic variations from 4.06% to 11.17%. However, they were all environments sensitive and detected in a single environment. Eleven QTLs for GWS were mapped on chromosomes 1A, 1B, 2A, 2D, 3A, 4D, 5A, 5B, and 6B with phenotypic variations rang-ing from 2.79% to 16.12%. The QTLQGws.cau-6B.2was identified in three environments and the favorable allele was contrib-uted by Beinong 6. The stable QTLs on chromosomes 3A, 4A, 6B, and 7D identified in this study may serve as target sites in marker-assisted selection of spike related traits in wheat breeding program.关键词
小麦/重组自交系/穗部性状/QTLKey words
Wheat/RILs/Spike trait/QTL引用本文复制引用
吴秋红,王立新,韩俊,袁成国,尤明山,刘志勇,陈娇娇,陈永兴,周升辉,傅琳,张德云,肖尧,王国鑫,王振忠..燕大1817/北农6号重组自交系群体穗部性状的QTL定位[J].作物学报,2015,(3):349-358,10.基金项目
本研究由国家自然科学基金项目(31271710,31301312)和国家重点基础研究计划(973计划)项目(2011CB100104)资助。 （31271710,31301312）
