Whole-genome resequencing reveals novel sex-related markers and candidate gene in the Chinese soft-shelled turtle (Pelodiscus sinensis)

IF 2.3 3区 农林科学 Q2 FISHERIES Journal of The World Aquaculture Society Pub Date : 2024-04-09 DOI:10.1111/jwas.13069
Dan Zeng, Mengying Chen, Jiawei Zeng, Yangyang Tu, Yucheng Zhang, Meiling Tan, Xiaoqing Wang
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Abstract

An apparent sexual dimorphism, such as growth rate and immunocompetence, is observed in the Chinese soft-shelled turtle (Pelodiscus sinensis). The identification of sex-related markers and candidate genes holds significance for the sex-controlled breeding of P. sinensis. In this study, through an integration of whole-genome resequencing and Sanger sequencing, 21 female-specific single nucleotide polymorphisms (SNPs) were identified. Based on these SNPs, the rapid and cost-effective molecular methodologies for genetic sex identification in P. sinensis were established. Of note, 19 validated SNPs are located within the zinc and ring finger 3 (ZNRF3) gene, which has been reported to be testis-determining in mammals. Cloning of the ZNRF3 gene from P. sinensis (PsZNRF3) and analysis of its expression profile in tissues and in response to sex steroid hormone treatment demonstrated exhibiting a female-biased expression pattern. These findings not only provide molecular markers for sex-controlled breeding in P. sinensis but also open up a solid basis for revealing the sex-determination mechanism of this species.

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全基因组测序揭示中华鳖新的性别相关标记和候选基因
中华鳖在生长速度和免疫能力等方面存在明显的性双态性。性别相关标记和候选基因的鉴定对中华鳖的性别控制育种具有重要意义。本研究通过整合全基因组重测序和桑格测序,鉴定出21个雌性特异性单核苷酸多态性(SNPs)。基于这些 SNPs,建立了快速、经济有效的分子方法来鉴定中华鳖的遗传性别。值得注意的是,19 个验证的 SNPs 位于锌和环指 3(ZNRF3)基因内,据报道该基因在哺乳动物中具有睾丸决定性作用。克隆中华鳖的 ZNRF3 基因(PsZNRF3)并分析其在组织中的表达谱以及对性激素处理的反应,结果表明该基因的表达模式偏向于雌性。这些发现不仅为中华鳖的性别控制育种提供了分子标记,而且为揭示该物种的性别决定机制奠定了坚实的基础。
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来源期刊
CiteScore
5.90
自引率
7.10%
发文量
69
审稿时长
2 months
期刊介绍: The Journal of the World Aquaculture Society is an international scientific journal publishing original research on the culture of aquatic plants and animals including: Nutrition; Disease; Genetics and breeding; Physiology; Environmental quality; Culture systems engineering; Husbandry practices; Economics and marketing.
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