Complex evolutionary trajectories of sex chromosomes across bird taxa

被引：224

作者：

Zhou, Qi ^{[1
]}

Zhang, Jilin ^{[2
]}

Bachtrog, Doris ^{[1
]}

An, Na ^{[2
]}

Huang, Quanfei ^{[2
]}

Jarvis, Erich D. ^{[3
]}

Gilbert, M. Thomas P. ^{[4
,5
]}

Zhang, Guojie ^{[2
,6
]}

机构：

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

[2] BGI Shenzhen, China Natl Genebank, Shenzhen 518083, Peoples R China

[3] Duke Univ, Med Ctr, Howard Hughes Med Inst, Dept Neurobiol, Durham, NC 27710 USA

[4] Univ Copenhagen, Nat Hist Museum Denmark, Ctr GeoGenet, Copenhagen, Denmark

[5] Curtin Univ, Dept Environm & Agr, Trace & Environm DNA Lab, Perth, WA 6102, Australia

[6] Univ Copenhagen, Dept Biol, Ctr Social Evolut, DK-2100 Copenhagen, Denmark

来源：

SCIENCE | 2014年 / 346卷 / 6215期

基金：

美国国家卫生研究院;

关键词：

HUMAN X-CHROMOSOME; HUMAN Y-CHROMOSOME; CHICKEN Z; INDEPENDENT CESSATION; EUDROMIA-ELEGANS; GENE-EXPRESSION; W-CHROMOSOME; GENOME; DIFFERENTIATION; STRATA;

D O I：

10.1126/science.1246338

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-specific chromosomes, like the W of most female birds and the Y of male mammals, usually have lost most genes owing to a lack of recombination. We analyze newly available genomes of 17 bird species representing the avian phylogenetic range, and find that more than half of them do not have as fully degenerated W chromosomes as that of chicken. We show that avian sex chromosomes harbor tremendous diversity among species in their composition of pseudoautosomal regions and degree of Z/W differentiation. Punctuated events of shared or lineage-specific recombination suppression have produced a gradient of "evolutionary strata" along the Z chromosome, which initiates from the putative avian sex-determining gene DMRT1 and ends at the pseudoautosomal region. W-linked genes are subject to ongoing functional decay after recombination was suppressed, and the tempo of degeneration slows down in older strata. Overall, we unveil a complex history of avian sex chromosome evolution.

引用

页码：1332 / +

页数：9

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