QTL mapping of yield-related traits in sesame

文献类型： 外文期刊

第一作者： Mei, Hongxian

作者： Mei, Hongxian;Liu, Yanyang;Cui, Chengqi;Du, Zhenwei;Wu, Ke;Jiang, Xiaolin;Zheng, Yongzhan;Hu, Chengda;Ma, Qingrong;Xie, Fuxin;Zheng, Lei

作者机构：

关键词： Sesamum indicum L; Genetic map; QTL; Yield-related traits

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

ISSN： 1380-3743

年卷期： 2021 年 41 卷 7 期

页码：

收录情况： SCI

摘要： Improving yield is one of the most important targets of sesame breeding. Identifying quantitative trait loci (QTLs) of yield-related traits is a prerequisite for marker-assisted selection (MAS) and QTL/gene cloning. In this study, a BC1 population was developed and genotyped with the specific-locus amplified fragment (SLAF) sequencing technology, and a high-density genetic map was constructed. The map consisted of 13 linkage groups, contained 3528 SLAF markers, and covered a total of 1312.52 cM genetic distance, with an average distance of 0.37 cM between adjacent markers. Based on the map, 46 significant QTLs were identified for seven yield-related traits across three environments. These QTLs distributed on 11 linkage groups, each explaining 2.34-71.41% of the phenotypic variation. Of the QTLs, 23 were stable QTLs that were detected in more than one environment, and 20 were major QTLs that explained more than 10% of the corresponding phenotypic variation in at least one environment. Favorable alleles of 38 QTLs originated from the locally adapted variety, Yuzhi 4; the exotic germplasm line, BS, contributed favorable alleles to only 8 QTLs. The results should provide useful information for future molecular breeding and functional gene cloning.

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