Identification of quantitative trait loci and development of diagnostic markers for growth habit traits in peanut (Arachis hypogaea L.)
文献类型： 外文期刊
作者： Fang, Yuanjin 1 ; Zhang, Xinyou 1 ; Liu, Hua 2 ; Wu, Jihua 3 ; Qi, Feiyan 2 ; Sun, Ziqi 2 ; Zheng, Zheng 2 ; Dong, Wenzhao 2 ; Huang, Bingyan 2 ;
作者机构： 1.Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China
2.Henan Acad Agr Sci, Henan Inst Crop Mol Breeding, Shennong Lab, Key Lab Oil Crops Huang Huai Hai Planis,Minist Agr, Zhengzhou 450002, Peoples R China
3.Shangqiu Acad Agr & Forestry, Shangqiu 476002, Peoples R China
关键词： Peanut; QTL; Growth habit; Molecular markers; Pod number
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）
ISSN： 0040-5752
年卷期： 2023 年 136 卷 5 期
页码：
收录情况： SCI
摘要： Key messageQTLs for growth habit are identified on Arahy.15 and Arahy.06 in peanut, and diagnostic markers are developed and validated for further use in marker-assisted breeding.Peanut is a unique legume crop because its pods develop and mature underground. The pegs derive from flowers following pollination, then reach the ground and develop into pods in the soil. Pod number per plant is influenced by peanut growth habit (GH) that has been categorized into four types, including erect, bunch, spreading and prostrate. Restricting pod development at the plant base, as would be the case for peanut plants with upright lateral branches, would decrease pod yield. On the other hand, GH characterized by spreading lateral branches on the ground would facilitate pod formation on the nodes, thereby increasing yield potential. We describe herein an investigation into the GH traits of 521 peanut recombinant inbred lines grown in three distinct environments. Quantitative trait loci (QTLs) for GH were identified on linkage group (LG) 15 between 203.1 and 204.2 cM and on LG 16 from 139.1 to 139.3 cM. Analysis of resequencing data in the identified QTL regions revealed that single nucleotide polymorphism (SNP) or insertion and/or deletion (INDEL) at Arahy15.156854742, Arahy15.156931574, Arahy15.156976352 and Arahy06.111973258 may affect the functions of their respective candidate genes, Arahy.QV02Z8, Arahy.509QUQ, Arahy.ATH5WE and Arahy.SC7TJM. These SNPs and INDELs in relation to peanut GH were further developed for KASP genotyping and tested on a panel of 77 peanut accessions with distinct GH features. This study validates four diagnostic markers that may be used to distinguish erect/bunch peanuts from spreading/prostrate peanuts, thereby facilitating marker-assisted selection for GH traits in peanut breeding.
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