Whole-genome sequence of a flatfish provides insights into ZW sex chromosome evolution and adaptation to a benthic lifestyle
Songlin Chen
(1)
,
Guojie Zhang
(2)
,
Changwei Shao
(1)
,
Quanfei Huang
(2)
,
Geng Liu
(2)
,
Pei Zhang
(2)
,
Wentao Song
(1)
,
Na An
(2)
,
Domitille Chalopin
(3)
,
Jean-Nicolas J.-N. Volff
(3)
,
Yunhan Hong
(4)
,
Qiye Li
(2)
,
Zhenxia Sha
(1)
,
Heling Zhou
(2)
,
Mingshu Xie
(1)
,
Qiulin Yu
(2)
,
Yang Liu
(5)
,
Hui Xiang
(6)
,
Na Wang
(1)
,
Kui Wu
(2)
,
Changgeng Yang
(1)
,
Qian Zhou
(2)
,
Xiaolin Liao
(1)
,
Linfeng Yang
(2)
,
Qiaomu Hu
(1)
,
Jilin Zhang
(2)
,
Liang Meng
(1)
,
Lijun Jin
(2)
,
Yongsheng Tian
(1)
,
Jinmin Lian
(2)
,
Jingfeng Yang
(1)
,
Guidong Miao
(1)
,
Shanshan Liu
(1)
,
Zhuo Liang
(1)
,
Fang Yan
(1)
,
Yangzhen Li
(1)
,
Bin Sun
(1)
,
Hong Zhang
(1)
,
Jing Zhang
(1)
,
Ying Zhu
(1)
,
Min Du
(1)
,
Yongwei Zhao
(1)
,
Manfred Schartl
(7)
,
Qisheng Tang
(1)
,
Jun Wang
(2, 8, 9)
1
Chinese Academy of Fishery Sciences
2 BGI - Beijing Genomics Institute [Shenzhen]
3 IGFL - Institut de Génomique Fonctionnelle de Lyon
4 Department of Biological Sciences
5 Dalian Ocean University
6 CAS - Chinese Academy of Sciences
7 University of Würzburg
8 Department of Biology
9 King Abdulaziz University
2 BGI - Beijing Genomics Institute [Shenzhen]
3 IGFL - Institut de Génomique Fonctionnelle de Lyon
4 Department of Biological Sciences
5 Dalian Ocean University
6 CAS - Chinese Academy of Sciences
7 University of Würzburg
8 Department of Biology
9 King Abdulaziz University
Na Wang
- Fonction : Auteur
- PersonId : 769254
- ORCID : 0000-0003-0007-4010
Jing Zhang
- Fonction : Auteur
- PersonId : 757517
- IdRef : 164499075
Manfred Schartl
- Fonction : Auteur
- PersonId : 775103
- ORCID : 0000-0001-9882-5948
- IdRef : 033492484
Jun Wang
- Fonction : Auteur
- PersonId : 881572
Résumé
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'.
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