| Literature DB >> 24487278 |
Songlin Chen1, Guojie Zhang2, Changwei Shao3, Quanfei Huang2, Geng Liu2, Pei Zhang2, Wentao Song4, Na An5, Domitille Chalopin6, Jean-Nicolas Volff6, Yunhan Hong7, Qiye Li5, Zhenxia Sha4, Heling Zhou5, Mingshu Xie4, Qiulin Yu5, Yang Liu8, Hui Xiang9, Na Wang4, Kui Wu5, Changgeng Yang4, Qian Zhou5, Xiaolin Liao4, Linfeng Yang5, Qiaomu Hu4, Jilin Zhang5, Liang Meng4, Lijun Jin5, Yongsheng Tian4, Jinmin Lian5, Jingfeng Yang4, Guidong Miao4, Shanshan Liu4, Zhuo Liang4, Fang Yan4, Yangzhen Li4, Bin Sun4, Hong Zhang4, Jing Zhang4, Ying Zhu4, Min Du4, Yongwei Zhao4, Manfred Schartl10, Qisheng Tang3, Jun Wang11.
Abstract
Genetic sex determination by W and Z chromosomes has developed independently in different groups of organisms. To better understand the evolution of sex chromosomes and the plasticity of sex-determination mechanisms, we sequenced the whole genomes of a male (ZZ) and a female (ZW) half-smooth tongue sole (Cynoglossus semilaevis). In addition to insights into adaptation to a benthic lifestyle, we find that the sex chromosomes of these fish are derived from the same ancestral vertebrate protochromosome as the avian W and Z chromosomes. Notably, the same gene on the Z chromosome, dmrt1, which is the male-determining gene in birds, showed convergent evolution of features that are compatible with a similar function in tongue sole. Comparison of the relatively young tongue sole sex chromosomes with those of mammals and birds identified events that occurred during the early phase of sex-chromosome evolution. Pertinent to the current debate about heterogametic sex-chromosome decay, we find that massive gene loss occurred in the wake of sex-chromosome 'birth'.Entities:
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Year: 2014 PMID： 24487278 DOI： 10.1038/ng.2890
Source DB: PubMed Journal: Nat Genet ISSN： 1061-4036 Impact factor: 38.330