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研究星鲽的性别决定揭示了鲽形目鱼类的性染色体进化，并鉴定出一个性别特异性标记。

Investigation of sex determination in starry flounder ( ) reveals sex chromosome evolution in Pleuronectiformes and identifies a sex-specific marker.

机构信息

State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong 266071, China.

School of Graduate, Chinese Academy of Agricultural Sciences, Beijing 100081, China.

出版信息

Zool Res. 2024 Nov 18;45(6):1347-1356. doi: 10.24272/j.issn.2095-8137.2024.078.

DOI:10.24272/j.issn.2095-8137.2024.078
PMID:39572017
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11668952/
Abstract

The identification of sex chromosomes is fundamental for exploring the mechanism and evolution of sex determination. , a species exhibiting clear sexual dimorphism and homomorphic chromosome pairs, has received limited research concerning its sex determination mechanisms. Clarifying the sex chromosome of will enhance our understanding of sex chromosome evolution in Pleuronectiformes. This study employed whole-genome resequencing to investigate the sex chromosome and sex determination system in . Notably, Chr23 was identified as the sex chromosome in , with the sex-determining region (SDR) occupying 48.1% of the chromosome and featuring an XX/XY system. Sex chromosome turnover was observed within Pleuronectiformes, with , , and sharing a common ancestral karyotype. No inversions were detected within the SDR of , although chromosomal rearrangements between sex chromosomes and autosomes were identified. Additionally, a sex-specific marker for was ascertained, enabling genetic sex identification, with significant implications for improving breeding programs and aquaculture practices.

摘要

性染色体的鉴定对于探索性别决定的机制和进化至关重要。牙鲆是一种表现出明显性别二态性和同形染色体对的物种，但其性别决定机制的研究相对较少。阐明牙鲆的性染色体将有助于我们理解鲽形目动物性染色体的进化。本研究采用全基因组重测序技术，对牙鲆的性染色体和性别决定系统进行了研究。值得注意的是，Chr23 被鉴定为牙鲆的性染色体，性决定区（SDR）占据了染色体的 48.1%，呈现出 XX/XY 系统。在鲽形目动物中观察到了性染色体的翻转，牙鲆、大菱鲆和半滑舌鳎共享一个共同的祖先核型。在牙鲆的 SDR 中没有发现倒位，但在性染色体和常染色体之间发现了染色体重排。此外，还确定了牙鲆的一个性别特异性标记，实现了遗传性别鉴定，这对改进繁殖计划和水产养殖实践具有重要意义。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/2e1fc8bc755e/zr-45-6-1347-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/4277971b2012/zr-45-6-1347-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/74e124bf2bf5/zr-45-6-1347-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/4bceaccfdd5e/zr-45-6-1347-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/79f8439268b0/zr-45-6-1347-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/2e1fc8bc755e/zr-45-6-1347-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/4277971b2012/zr-45-6-1347-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/74e124bf2bf5/zr-45-6-1347-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/4bceaccfdd5e/zr-45-6-1347-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/79f8439268b0/zr-45-6-1347-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b214/11668952/2e1fc8bc755e/zr-45-6-1347-5.jpg

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本文引用的文献

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Sci Data. 2023 Dec 13;10(1):893. doi: 10.1038/s41597-023-02790-z.
2
Evolution of a ZW sex chromosome system in willows.柳树中 ZW 性染色体系统的演化。
Nat Commun. 2023 Nov 6;14(1):7144. doi: 10.1038/s41467-023-42880-5.
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Origin and chromatin remodeling of young X/Y sex chromosomes in catfish with sexual plasticity.具有性可塑性的鲶鱼中年轻X/Y性染色体的起源与染色质重塑
Natl Sci Rev. 2022 Oct 28;10(2):nwac239. doi: 10.1093/nsr/nwac239. eCollection 2023 Feb.
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Independent Evolution of Sex Chromosomes and Male Pregnancy-Related Genes in Two Seahorse Species.两种海马物种中性染色体和与雄性怀孕相关基因的独立进化。
Mol Biol Evol. 2023 Jan 4;40(1). doi: 10.1093/molbev/msac279.
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A chromosome minimalist view of genome regulation and evolution based on mouse chromosome engineering.基于小鼠染色体工程的基因组调控与进化的染色体极简主义观点。
Zool Res. 2022 Nov 18;43(6):949-951. doi: 10.24272/j.issn.2095-8137.2022.386.
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Y-specific allele, , is the master sex-determining gene in Japanese flounder .Y特异性等位基因是日本牙鲆的主要性别决定基因。
Front Genet. 2022 Sep 16;13:1007548. doi: 10.3389/fgene.2022.1007548. eCollection 2022.
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ceRNA crosstalk mediated by ncRNAs is a novel regulatory mechanism in fish sex determination and differentiation.ncRNAs 介导的 ceRNA 串扰是鱼类性别决定和分化的一种新的调控机制。
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