High-Density Genetic Variation Map Reveals Key Candidate Loci and Genes Associated With Important Agronomic Traits in Peanut
文献类型： 外文期刊
作者： Zhao, Huiling 1 ; Tian, Ruizheng 1 ; Xia, Han 1 ; Li, Changsheng 1 ; Li, Guanghui 1 ; Li, Aiqin 1 ; Zhang, Xianying 1 ; Zhou, Ximeng 1 ; Ma, Jing 1 ; Huang, Huailing 1 ; Zhang, Kun 1 ; Thudi, Mahendar 1 ; Ma, Changle 2 ; Wang, Xingjun 1 ; Zhao, Chuanzhi 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Biotechnol, Inst Crop Germplasm Resources, Shandong Prov Key Lab Crop Genet Improvement Ecol, Jinan, Peoples R China
2.Shandong Normal Univ, Coll Life Sci, Jinan, Peoples R China
3.Shandong Agr & Engn Univ, Coll Agr Sci & Technol, Jinan, Peoples R China
4.Rajendra Prasad Cent Agr Univ, Samsthipur, India
关键词： peanut; GWAS; SNP array; molecular markers; agronomic traits
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.772； 五年影响因子：4.933 ）
ISSN：
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Peanut is one of the most important cash crops with high quality oil, high protein content, and many other nutritional elements, and grown globally. Cultivated peanut (Arachis hypogaea L.) is allotetraploid with a narrow genetic base, and its genetics and molecular mechanisms controlling the agronomic traits are poorly understood. Here, we report a comprehensive genome variation map based on the genotyping of a panel of 178 peanut cultivars using Axiom_Arachis2 SNP array, including 163 representative varieties of different provinces in China, and 15 cultivars from 9 other countries. According to principal component analysis (PCA) and phylogenetic analysis, the peanut varieties were divided into 7 groups, notable genetic divergences between the different areas were shaped by environment and domestication. Using genome-wide association study (GWAS) analysis, we identified several marker-trait associations (MTAs) and candidate genes potentially involved in regulating several agronomic traits of peanut, including one MTA related with hundred seed weight, one MTA related with total number of branches, and 14 MTAs related with pod shape. This study outlines the genetic basis of these peanut cultivars and provides 13,125 polymorphic SNP markers for further distinguishing and utility of these elite cultivars. In addition, the candidate loci and genes provide valuable information for further fine mapping of QTLs and improving the quality and yield of peanut using a genomic-assisted breeding method.
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