Sex and neo-sex chromosome evolution in beetles

被引：4

作者：

Bracewell, Ryan ^{[1
,2
]}

Tran, Anita ^{[1
]}

Chatla, Kamalakar ^{[1
]}

Bachtrog, Doris ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA

[2] Indiana Univ, Dept Biol, Bloomington, IN USA

来源：

PLOS GENETICS | 2024年 / 20卷 / 11期

基金：

美国国家卫生研究院;

关键词：

DOSAGE COMPENSATION; X-CHROMOSOME; GENOME; COLEOPTERA; VISUALIZATION; DROSOPHILA; TRIBOLIUM; PROVIDES; SYSTEM;

D O I：

10.1371/journal.pgen.1011477

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Beetles are the most species-rich group of animals and harbor diverse karyotypes. Most species have XY sex chromosomes, but X0 sex determination mechanisms are also common in some groups. We generated a whole-chromosome assembly of Tribolium confusum, which has a neo-sex chromosome, and utilize eleven additional beetle genomes to reconstruct karyotype evolution across Coleoptera. We identify ancestral linkage groups, termed Stevens elements, that share a conserved set of genes across beetles. While the ancestral X chromosome is maintained across beetles, we find independent additions of autosomes to the ancestral sex chromosomes. These neo-sex chromosomes evolve the stereotypical properties of sex chromosomes, including the evolution of dosage compensation and a non-random distribution of genes with sex-biased expression. Beetles thus provide a novel model to gain a better understanding of the diverse forces driving sex chromosome evolution.

引用

页数：19

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