Identification of Sex-Specific Markers and Candidate Genes Using WGS Sequencing Reveals a ZW-Type Sex-Determination System in the Chinese Soft-Shell Turtle (Pelodiscus sinensis)
文献类型： 外文期刊
作者： Zhu, Junxian 1 ; Wang, Yongchang 2 ; Chen, Chen 2 ; Ji, Liqin 2 ; Hong, Xiaoyou 2 ; Liu, Xiaoli 2 ; Chen, Haigang 2 ; Wei, Chengqing 2 ; Zhu, Xinping 1 ; Li, Wei 1 ;
作者机构： 1.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
2.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resources Applicat, Minist Agr & Rural Affairs, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
关键词： Pelodiscus sinensis; whole-genome sequencing; sex-specific sequence screening; sex-specific markers; sex-determining candidate genes
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN： 1661-6596
年卷期： 2024 年 25 卷 2 期
页码：
收录情况： SCI
摘要： Male and female Chinese soft-shelled turtles (Pelodiscus sinensis) have sex-dimorphic growth patterns, and males have higher commercial value because of their larger size and thicker calipash. Thus, developing sex-specific markers is beneficial to studies on all-male breeding in P. sinensis. Here, we developed an accurate and efficient workflow for the screening of sex-specific sequences with ZW or XY sex determination systems. Based on this workflow, female and male P. sinensis reference genomes of 2.23 Gb and 2.26 Gb were obtained using de novo assembly. After aligning and filtering, 4.01 Mb female-specific sequences were finally identified. Subsequently, the seven developed sex-specific primer pairs were 100% accurate in preliminary, population, and embryonic validation. The presence and absence of bands for the primers of P44, P45, P66, P67, P68, and P69, as well as two and one bands for the PB1 primer, indicate that the embryos are genetically female and male, respectively. NR and functional annotations identified several sex-determining candidate genes and related pathways, including Ran, Eif4et, and Crkl genes, and the insulin signaling pathway and the cAMP signaling pathway, respectively. Collectively, our results reveal that a ZW-type sex-determination system is present in P. sinensis and provide novel insights for the screening of sex-specific markers, sex-control breeding, and the studies of the sex determination mechanism of P. sinensis.
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