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Molecular mapping for fruit-related traits, and joint identification of candidate genes and selective sweeps for seed size in melon

文献类型： 外文期刊

作者： Zhang, Hong 1 ; Zhang, Xuejun 1 ; Li, Meihua 1 ; Yang, Yong 1 ; Li, Zhiqiang 2 ; Xu, Yuhui 2 ; Wang, Haojie 1 ; Wang, Dengming 1 ; Zhang, Yongbing 1 ; Wang, Huaisong 3 ; Fu, Qiushi 3 ; Zheng, Jing 3 ; Yi, Hongping 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Hami Melon Res Ctr, Urumqi 830091, Xinjiang, Peoples R China

2.Adsen Biotechnol Co Ltd, Urumqi 830022, Peoples R China

3.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China

关键词： Resequencing; High-density genetic map; QTL; RNA-seq; Selective sweep; Melon; Fruit-and seed-related traits

期刊名称：GENOMICS （ 影响因子：4.31； 五年影响因子：4.38 ）

ISSN： 0888-7543

年卷期： 2022 年 114 卷 2 期

页码：

收录情况： SCI

摘要： Melon is a popular fruit vegetable crop worldwide with diverse morphological variation. We report a high density genetic map of melon and nine major QTLs with physical region ranging from 43.47 kb to 1.89 Mb. Importantly, two seed-related trait QTLs were repeatedly detected in two environments, and the mapping region was narrowed to 522 kb according to a regional linkage analysis. A total of 40 annotated genes were screened for nonsynonymous variations, of which EVM0009818, involved in cytokinin-activated signaling, was differentially expressed in the young fruits of parents based on RNA-seq. Selective sweep analysis identified 152 sweep signals for seed size, including the two seed-related QTLs and nine homologs that have been verified to regulate seed size in Arabidopsis or rice. This work illustrates the power of a joint analysis combining resequencing-based genetic map for QTL mapping and a combination of KASP genotyping and RNA-seq analysis to facilitate QTL fine mapping.

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