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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2021, Vol. 43 ›› Issue (6): 1025-1030.doi: 10.19802/j.issn.1007-9084.2021015

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QTL mapping for 100-pod and 100-seed weights in cultivated peanut

Feng-gao CUI1, Xiao-hui HU1, Hua-rong MIAO1, Sheng-zhong ZHANG1, Juan WANG1, Song WANG2, Gang HOU3, Jie SUI4, Jian-cheng ZHANG1(), Jing CHEN1()   

  1. 1.Shandong Peanut Research Institute, Qingdao 266100, China
    2.Institute of Crops, Anhui Academy of Agricultural Science, Hefei 230001, China
    3.Tieling Agricultural Research Institute, Tieling 112616, China
    4.Shandong Academy of Agricultural Sciences,Jinan 250100, China
  • Received:2021-01-06 Online:2021-12-22 Published:2021-12-23
  • Contact: Jian-cheng ZHANG,Jing CHEN E-mail:13863920622@163.com;mianbaohua2008@126.com;13863920622@163.com

Abstract:

A peanut recombinant inbred population with Huayu 28 and P76 as parents was used to perform genetic mapping for 100-pod and 100-seed weight. Phenotypic data of 100-pod and 100-seed weight were collected in 3 environments. QTL mapping analysis was performed with individual environmental analysis and multi-environmental joint analysis. Multi-environmental joint analysis demonstrated 5 QTLs for 100-pod weight and 10 QTLs for 100-seed weight. Individual environmental analysis yielded 3 QTLs for 100-pod weight (qHPW05.1, qHPW07.1, qHPW19.1) on 3 linkage groups, and 4 QTLs for 100-seed weight (qHSW05.1, qHSW07.1, qHSW19.1, qHSW20.1) on 4 linkage groups. Among these, qHPW07.1, qHPW19.1, qHSW 07.1 and qHSW 19.1 could be detected in two or three environments with phenotypic variation explained (PVE) ranging from 4.610%-8.840%, 9.985%-11.224%, 7.155%-10.464% and 7.239%-13.845%. qHPW07.1 could be detected in 3 environments with phenotypic variation explained (PVE) of 4.610%-8.840%. Comparative analysis of all QTLs revealed two QTL clusters on LG07 (Cluster I) and LG19 (ClusterⅡ). These results provided a theoretical basis for both improvement of peanut yield and cloning of associated genes.

Key words: peanut, 100 pod weight, 100 seed weight, QTL

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