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中国油料作物学报 ›› 2019, Vol. 41 ›› Issue (6): 869-.doi: 10.19802/j.issn.1007-9084.2019125

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QTL mapping for traits of pod size and weight in cultivated peanut (Arachis hypogaea L.)

  

  1. 1. Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Ge? netic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China; 
    2. Nanchong Acad? emy of Agricultural Sciences, Nanchong 637000, China
  • Online:2019-12-28 Published:2019-12-20

Abstract:

Pod-related traits are important to peanut yield. To better understand genetic basis of peanut yield, QTL mapping for pod-related traits was conducted using 166 recombinant inbred lines. The lines were derived from parents Zhonghua 5 and ICGV 86699 which were significantly different in pod size and weight. Pod length and width in 5 environments and 100-pod weight in 6 environments were investigated for QTL mapping by population phenotyping and by genotyping. Nine pod-length QTLs, 10 pod-width QTLs and 12 100-pod-weight QTLs were de? tected respectively. Among them, 10 QTLs were repeatedly detected in multiple environments (including 6 stable QTLs detected in different locations). Among the 6 stable ones, 5 QTLs (qPLB06.2, qPLB06.3, qPWB06.2, qHP? WB04.3 and qHPWB06.3) had more than 10% PVE (phenotypic variation explained) in at least one environment. Five QTL clusters were identified. QTL clusters Ⅳ and Ⅴ, located on B06, were collocated with pod-related QTLs, which were stably detected in multiple environments. The collocations showed obvious genetic correlations among the pod traits.

Key words: cultivated peanut, pod, QTL mapping, stable QTL, QTL cluster