Dynamics of sex chromosome evolution in a rapid radiation of cichlid fishes

被引：55

作者：

El Taher, Athimed ^{[1
]}

Ronco, Fabrizia ^{[1
]}

Matschiner, Michael ^{[1
,2
,3
]}

Salzburger, Walter ^{[1
]}

Boehne, Astrid ^{[1
,4
]}

机构：

[1] Univ Basel, Zool Inst, Dept Environm Sci, Basel, Switzerland

[2] Univ Zurich, Dept Paleontol & Museum, Zurich, Switzerland

[3] Univ Oslo, Ctr Ecol & Evolutionary Synth CEES, Dept Biosci, Oslo, Norway

[4] Zool Res Museum Alexander Koenig, Ctr Mol Biodivers Res, Bonn, Germany

来源：

SCIENCE ADVANCES | 2021年 / 7卷 / 36期

基金：

瑞士国家科学基金会; 欧洲研究理事会;

关键词：

VARIANT CALL FORMAT; SYMPATRIC SPECIATION; SELECTION; RECOMBINATION; RESTRICTION; TRANSITIONS; MECHANISMS; GENETICS; INSIGHTS; RATIO;

D O I：

10.1126/sciadv.abe8215

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Sex is a fundamental trait determined by environmental and/or genetic factors, including sex chromosomes. Sex chromosomes are studied in species scattered across the tree of life, yet little is known about tempo and mode of sex chromosome evolution among closely related species. Here, we examine sex chromosome evolution in the adaptive radiation of cichlid fishes in Lake Tanganyika. Through the analysis of male and female genomes from 244 cichlid taxa (189 described species with 5 represented with two local variants/populations; 50 undescribed species) and of 396 multitissue transcriptomes from 66 taxa, we identify signatures of sex chromosomes in 79 taxa, involving 12 linkage groups. We find that Tanganyikan cichlids have the highest rates of sex chromosome turnover and heterogamety transitions known to date. We show that sex chromosome recruitment is not at random. Moreover convergently emerged sex chromosomes in cichlids support the "limited options" hypothesis of sex chromosome evolution.

引用

页数：16

共 67 条

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