Detection of major loci associated with the variation of 18 important agronomic traits between Solanum pimpinellifolium and cultivated tomatoes

文献类型： 外文期刊

第一作者： Zhang, Shuaibin

作者： Zhang, Shuaibin;Wang, Ketao;Zheng, Zheng;Liu, Lei;Xu, Meng;Jiao, Zhicheng;Li, Ren;Liu, Xiyan;Cui, Xia;Zhang, Shuaibin;Xu, Meng;Jiao, Zhicheng;Li, Ren;Cui, Xia;Yu, Hong;Li, Jiayang;Yu, Hong;Li, Jiayang;Wang, Ketao;Zheng, Zheng

作者机构：

关键词： Solanum lycopersicum; RILs; agronomic traits; wild species; cultivated species

期刊名称：PLANT JOURNAL （ 影响因子：6.417； 五年影响因子：7.627 ）

ISSN： 0960-7412

年卷期： 2018 年 95 卷 2 期

页码：

收录情况： SCI

摘要： Wild species can be used to improve various agronomic traits in cultivars; however, a limited understanding of the genetic basis underlying the morphological differences between wild and cultivated species hinders the integration of beneficial traits from wild species. In the present study, we generated and sequenced recombinant inbred lines (RILs, 201 F-10 lines) derived from a cross between Solanum pimpinellifolium and Solanum lycopersicum tomatoes. Based on a high-resolution recombination bin map to uncover major loci determining the phenotypic variance between wild and cultivated tomatoes, 104 significantly associated loci were identified for 18 agronomic traits. On average, these loci explained similar to 39% of the phenotypic variance of the RILs. We further generated near-isogenic lines (NILs) for four identified loci, and the lines exhibited significant differences for the associated traits. We found that two loci could improve the flower number and inflorescence architecture in the cultivar following introgression of the wild-species alleles. These findings allowed us to construct a trait-locus network to help explain the correlations among different traits based on the pleiotropic or linked loci. Our results provide insights into the morphological changes between wild and cultivated tomatoes, and will help to identify key genes governing important agronomic traits for the molecular selection of elite tomato varieties.

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