Genome-wide association study of soybean seed germination under drought stress

非生物胁迫 基因 数量性状位点 干旱胁迫 遗传学 基因组
作者
Zhangxiong Liu,Huihui Li,Gou Zuowang,Zhang Yanjun,Xingrong Wang,Honglei Ren,Zixiang Wen,Beom-Kyu Kang,Yinghui Li,Lili Yu,Huawei Gao,Dechun Wang,Xusheng Qi,Lijuan Qiu
出处
期刊:Molecular Genetics and Genomics [Springer Science+Business Media]
卷期号:295 (3): 661-673 被引量:5
标识
DOI:10.1007/s00438-020-01646-0
摘要

Drought stress, which is increasing with climate change, is a serious threat to agricultural sustainability worldwide. Seed germination is an essential growth phase that ensures the successful establishment and productivity of soybean, which can lose substantial productivity in soils with water deficits. However, only limited genetic information is available about how germinating soybean seeds may exert drought tolerance. In this study, we examined the germinating seed drought-tolerance phenotypes and genotypes of a panel of 259 released Chinese soybean cultivars panel. Based on 4616 Single-Nucleotide Polymorphisms (SNPs), we conducted a mixed-linear model GWAS that identified a total of 15 SNPs associated with at least one drought-tolerance index. Notably, three of these SNPs were commonly associated with two drought-tolerance indices. Two of these SNPs are positioned upstream of genes, and 11 of them are located in or near regions where QTLs have been previously mapped by linkage analysis, five of which are drought-related. The SNPs detected in this study can both drive hypothesis-driven research to deepen our understanding of genetic basis of soybean drought tolerance at the germination stage and provide useful genetic resources that can facilitate the selection of drought stress traits via genomic-assisted selection.
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