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

文献类型： 外文期刊

作者： Liu, Zhangxiong 1 ; Li, Huihui 1 ; Gou, Zuowang 2 ; Zhang, Yanjun 2 ; Wang, Xingrong 2 ; Ren, Honglei 3 ; Wen, Zixiang 4 ;

作者机构： 1.Chinese Acad Agr Sci, Natl Key Facil Gene Resources & Genet Improvement, Key Lab Crop Germplasm Utilizat, Minist Agr,Inst Crop Sci, Beijing 100081, Peoples R China

2.Gansu Acad Agr Sci, Inst Crop Sci, Lanzhou 730070, Peoples R China

3.Heilongjiang Acad Agr Sci, Maize Res Inst, Harbin 150086, Peoples R China

4.Michigan State Univ, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 USA

5.Natl Inst Crop Sci, Dept Southern Area Crop Sci, Upland Crop Breeding Res Div, Miryang 52402, South Korea

关键词： Soybean; Drought tolerance; Germination stage; Genome-wide association analysis (GWAS); Single-nucleotide polymorphisms (SNP)

期刊名称：MOLECULAR GENETICS AND GENOMICS （ 影响因子：3.291； 五年影响因子：3.257 ）

ISSN： 1617-4615

年卷期：

页码：

收录情况： SCI

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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