Genome-wide association study reveals the genetic basis of yield- and quality-related traits in wheat

BMC Plant Biology

Ke Xu¹  Shuhua Zhang¹  Yong Zhao¹  Le Gao¹  Tengfei Yi¹  Huiwen Cao¹  Chengsheng Meng¹  Xueju Yang¹ 

[1] State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, 071000, Baoding, Hebei, China;

关键词: GWAS;    Quality;    Single nucleotide polymorphism;    Wheat;    Yield;   

DOI  :  10.1186/s12870-021-02925-7

来源: Springer

【 摘 要 】

BackgroundIdentifying the loci and dissecting the genetic architecture underlying wheat yield- and quality-related traits are essential for wheat breeding. A genome-wide association study was conducted using a high-density 90 K SNP array to analyze the yield- and quality-related traits of 543 bread wheat varieties.ResultsA total of 11,140 polymorphic SNPs were distributed on 21 chromosomes, including 270 significant SNPs associated with 25 yield- and quality-related traits. Additionally, 638 putative candidate genes were detected near the significant SNPs based on BLUP data, including three (TraesCS7A01G482000, TraesCS4B01G343700, and TraesCS6B01G295400) related to spikelet number per spike, diameter of the first internode, and grain volume. The three candidate genes were further analyzed using stage- and tissue- specific gene expression data derived from an RNA-seq analysis. These genes are promising candidates for enhancing yield- and quality-related traits in wheat.ConclusionsThe results of this study provide a new insight to understand the genetic basis of wheat yield and quality. Furthermore, the markers detected in this study may be applicable for marker-assisted selection in wheat breeding programs.

【 授权许可】

CC BY