普通小麦产量相关农艺性状的全基因组关联分析OA

To analyze the genetic rules of agronomic traits related to wheat yield,in this study,319 wheat materials and 16K SNP array data were utilized.Through the method of genome-wide associa-tion study(GW AS),seven yield-related traits,namely plant height,spike length,number of spike-lets per spike,1 000-grain weight,grain length,grain width,and grain length-to-width ratio,were analyzed in five environments.The results showed that all the seven traits exhibited extensive pheno-typic variations,with the coefficient of variation ranging from 5.97％to 15.77％,and the broad-sense heritability ranging from 82.42％to 96.62％.The results of the genome-wide association analysis in-dicated that a total of 98 significant and stable SNP loci were detected in five environments,explaining 2.9％to 12.1％of the phenotypic variations.Among them,three SNP loci,namely 1D-325966494,2D-645942075,and 7D-166300030,showed pleiotropy.Through haplotype analysis,two excellent haplotypes that significantly reduced the plant height were obtained,which were located in specific re-gions of chromosomes 2A and 3A.One candidate gene TraesCS2A02G457400 related to plant height was identified,and its function has not been clarified yet.