title: Genetic mapping of yield traits using RIL population derived from Fuchuan Dahuasheng and ICG6375 of peanut (Arachis hypogaeaL.).
abstract: The genetic architecture determinants of yield traits in peanut (Arachis hypogaeaL.) are poorly understood. In the present study, an effort was made to map quantitative trait loci (QTLs) for yield traits using recombinant inbred lines (RIL). A genetic linkage map was constructed containing 609 loci, covering a total of 1557.48 cM with an average distance of 2.56 cM between adjacent markers. The present map exhibited good collinearity with the physical map of diploid species ofArachis. Ninety-two repeatable QTLs were identified for 11 traits including height of main stem, total branching number, and nine pod- and seed-related traits. Of the 92 QTLs, 15 QTLs were expressed across three environments and 65 QTLs were newly identified. Twelve QTLs for the height of main stem and the pod- and seed-related traits explaining more than 10 % of phenotypic variation showed a great potential for marker-assisted selection in improving these traits. The trait-by-trait meta-analysis revealed 33 consensus QTLs. The consensus QTLs and other QTLs were further integrated into 29 pleiotropic unique QTLs with the confidence interval of 1.86 cM on average. The significant co-localization of QTLs was consistent with the significant phenotypic correlations among these traits. The complexity of the genetic architecture of yield traits was demonstrated. The present QTLs for pod- and seed-related traits could be the most fundamental genetic factors contributing to the yield traits in peanut. The results provide a good foundation for fine mapping, cloning and designing molecular breeding of favorable genes in peanut.
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Yuning
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Ren
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Huang
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Liying
authors.initials: L
authors.lastname: Yan
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Yongqing
authors.initials: Y
authors.lastname: Jiao
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Weigang
authors.initials: W
authors.lastname: Chen
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Shunmou
authors.initials: S
authors.lastname: Huang
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Liyun
authors.initials: L
authors.lastname: Wan
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Lei
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Boshou
authors.initials: B
authors.lastname: Liao
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Dongxin
authors.initials: D
authors.lastname: Huai
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Wenhui
authors.initials: W
authors.lastname: Wei
authors.affiliation: Oil Crop Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agricultural, Wuhan, 430062 People's Republic of China.
authors.forename: Huifang
authors.initials: H
authors.lastname: Jiang
keywords: Peanut (Arachis hypogaea L); Pod weight; QTL analysis; Seed length; Seed weight; Seed width; Yield traits