A genome-wide association study reveals novel loci and candidate genes associated with plant height variation in Medicago sativa

文献类型： 外文期刊

第一作者： Jiang, Xueqian

作者： Jiang, Xueqian;He, Fei;Zhang, Fan;Jiang, Xu;Long, Ruicai;Li, Mingna;Yang, Qingchuan;Kang, Junmei;Zhang, Tiejun;Yang, Tianhui;Wang, Chuan;Gao, Ting;Yang, Tianhui;Wang, Yue

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关键词： Alfalfa (Medicago sativa); GWAS; Plant height; Phosphate transporter

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.3； 五年影响因子：5.2 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Background Plant height (PH) is an important agronomic trait influenced by a complex genetic network. However, the genetic basis for the variation in PH in Medicago sativa remains largely unknown. In this study, a comprehensive genome-wide association analysis was performed to identify genomic regions associated with PH using a diverse panel of 220 accessions of M. sativa worldwide. Results Our study identified eight novel single nucleotide polymorphisms (SNPs) significantly associated with PH evaluated in five environments, explaining 8.59-12.27% of the phenotypic variance. Among these SNPs, the favorable genotype of chr6__31716285 had a low frequency of 16.4%. Msa0882400, located proximal to this SNP, was annotated as phosphate transporter 3;1, and its role in regulating alfalfa PH was supported by transcriptome and candidate gene association analysis. In addition, 21 candidate genes were annotated within the associated regions that are involved in various biological processes related to plant growth and development. Conclusions Our findings provide new molecular markers for marker-assisted selection in M. sativa breeding programs. Furthermore, this study enhances our understanding of the underlying genetic and molecular mechanisms governing PH variations in M. sativa.

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