Genome-wide association study dissecting drought resistance- associated loci based on physiological traits in common bean

文献类型： 外文期刊

第一作者： Wu, Lei

作者： Wu, Lei;Wu, Lei;Chang, Yujie;Wang, Lanfen;Wang, Shumin;Wu, Jing;Wu, Jing

作者机构：

关键词： common bean; drought resistance; GWAS; physiological trait

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2024 年 23 卷 11 期

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收录情况： SCI

摘要： Genetic improvement of drought resistance is one of the main breeding goals for common bean, so molecular markers must be identified to facilitate drought resistance breeding. In this study, we evaluated the proline, trehalose, raffinose, and stachyose contents of 210 common bean accessions under two watering conditions and found large variations in all four. The coefficients of variation ranged from 21.21% for proline content to 78.69% for stachyose content under well-watered conditions, and from 20.11% for proline content to 50.08% for trehalose content under drought stress. According to our genome-wide association analysis, 32 quantitative trait loci were associated with drought resistance, seven of which overlapped with known loci. Four hotspot regions were identified at Pv01, Pv07 and Pv11. A set of candidate genes was identified, including genes encoding MYB, bZIP, bHLH, ERF, and protein kinases. Among these genes, Phvul.001G189400, Phvul.007G273000 and Phvul.008G270500 were annotated as bZIP, ERF and WRKY, respectively. These genes are reportedly involved in drought stress responses in Arabidopsis thaliana and were induced by drought stress in common bean. Significant SNPs in six candidate gene regions formed different haplotypes, and phenotypic analysis revealed significant differences among the haplotypes. These results provide new insight into the genetic basis of drought resistance in common bean and reveal candidate genes and superior natural variations that will be useful for improving common bean.

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