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
作者： Jiang, Xueqian 1 ; Yang, Tianhui 3 ; He, Fei 1 ; Zhang, Fan 1 ; Jiang, Xu 1 ; Wang, Chuan 3 ; Gao, Ting 3 ; Long, Ruicai 1 ; Li, Mingna 1 ; Yang, Qingchuan 1 ; Wang, Yue 5 ; Zhang, Tiejun 2 ; Kang, Junmei 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Anim Sci, Beijing, Peoples R China
2.Beijing Forestry Univ, Sch Grassland Sci, Beijing, Peoples R China
3.Ningxia Acad Agr & Forestry Sci, Inst Anim Sci, Yinchuan, Ningxia, Peoples R China
4.Chinese Acad Agr Sci, Inst Grassland Res, Hohhot, Inner Mongolia, Peoples R China
5.Beijing 19 High Sch, Beijing, Peoples R China
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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