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Turnovers of Sex-Determining Mutation in the Golden Pompano and Related Species Provide Insights into Microevolution of Undifferentiated Sex Chromosome

文献类型： 外文期刊

作者： Guo, Liang 1 ; Malara, Danilo 3 ; Battaglia, Pietro 4 ; Waiho, Khor 5 ; Davis, D. Allen 8 ; Deng, Yu 1 ; Shen, Zhongyuan 1 ; Rao, Ke 1 ;

作者机构： 1.Hunan Normal Univ, State Key Lab Dev Biol Freshwater Fish, Changsha 410081, Hunan, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

3.Calabria Marine Ctr, CRIMAC, Integrated Marine Ecol Dept, Stn Zool Anton Dohrn, Amendolara, Italy

4.Sicily Marine Ctr, Integrated Marine Ecol Dept, Stn Zool Anton Dohrn, I-98168 Messina, Italy

5.Univ Malaysia Terengganu, Higher Inst Ctr Excellence HICoE, Inst Trop Aquaculture & Fisheries, Kuala Nerus 21300, Terengganu, Malaysia

6.Univ Sains Malaysia, Ctr Chem Biol, Minden 11900, Malaysia

7.Kasetsart Univ, Fac Fisheries, Dept Aquaculture, Bangkok 10900, Thailand

8.Auburn Univ, Sch Fisheries Aquaculture & Aquat Sci, Auburn, AL 36830 USA

关键词： sex chromosome; alternative splicing; sex-determining mutation; zebrafish mutant; sex-differential selection; simulation

期刊名称：GENOME BIOLOGY AND EVOLUTION （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 1759-6653

年卷期： 2024 年 16 卷 3 期

页码：

收录情况： SCI

摘要： The suppression of recombination is considered a hallmark of sex chromosome evolution. However, previous research has identified undifferentiated sex chromosomes and sex determination by single SNP in the greater amberjack (Seriola dumerili). We observed the same phenomena in the golden pompano (Trachinotus ovatus) of the same family Carangidae and discovered a different sex-determining SNP within the same gene Hsd17b1. We propose an evolutionary model elucidating the turnover of sex-determining mutations by highlighting the contrasting dynamics between purifying selection, responsible for maintaining W-linked Hsd17b1, and neutral evolution, which drives Z-linked Hsd17b1. Additionally, sporadic loss-of-function mutations in W-linked Hsd17b1 contribute to the conversion of W chromosomes into Z chromosomes. This model was directly supported by simulations, closely related species, and indirectly by zebrafish mutants. These findings shed new light on the early stages of sex chromosome evolution.

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