QTL Mapping and Marker Identification for Sex-Determining: Indicating XY Sex Determination System in the Swimming Crab (Portunus trituberculatus)
文献类型: 外文期刊
第一作者: Lv, Jianjian
作者: Lv, Jianjian;Sun, Dongfang;Huan, Pengpeng;Song, Liu;Liu, Ping;Li, Jian;Lv, Jianjian;Liu, Ping;Li, Jian
作者机构:
关键词: QTL; sex marker; XY sex determination system; Portunus trituberculatus; sex-related gene
期刊名称:FRONTIERS IN GENETICS ( 影响因子:4.599; 五年影响因子:4.888 )
ISSN: 1664-8021
年卷期: 2018 年 9 卷
页码:
收录情况: SCI
摘要: Sex determination is an important area of research, which has always had an intriguing aspect in evolutionary and developmental biology. Quantitative trait locus (QTL) mapping for sex will be helpful in clarifying the sex determination system. In this study, the sex QTL mapping of the swimming crab (Portunus trituberculatus) was performed based on a high-density linkage map, and a highly significant QTL specifically mapped on a single linkage group (LG) was firstly identified (LG24, LOD > 14). Twenty markers in the QTL region showed significant associations with sex by association analysis, of which heterogametic genotypes in males supported the XY sex determination mechanism. Two sex-specific markers at the family level were identified via segregation distortion analysis, which were known to be the most closely linked to the sex of P. trituberculatus. Based on sex marker sequences (Marker3840, Marker20320, and Marker10494), three potential sex-related genes were identified, and the quantitative real-time PCR results suggested that these genes were important in spermatogenesis or sex characteristics in males. Our results will contribute to the fine-mapping of sex-determining genes and clarify the sex determination mechanism of P. trituberculatus.
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