Phylogeny and sex chromosome evolution of palaeognathae
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Many paleognaths (ratites and tinamous) have a pair of homomorphic ZW sex chromosomes in contrast to the highly differentiated sex chromosomes of most other birds. To understand the evolutionary causes for the different tempos of sex chromosome evolution, we produced female genomes of 12 paleognathous species and reconstructed the phylogeny and the evolutionary history of paleognathous sex chromosomes. We uncovered that Palaeognathae sex chromosomes had undergone stepwise recombination suppression and formed a pattern of “evolutionary strata”. Nine of the 15 studied species' sex chromosomes have maintained homologous recombination in their long pseudoautosomal regions extending more than half of the entire chromosome length. We found that in older strata, the W chromosome suffered more serious functional gene loss. Their homologous Z-linked regions, compared with other genomic regions, have produced an excess of species-specific autosomal duplicated genes that evolved female-specific expression, in contrast to their broadly expressed progenitors. We speculate the “defeminization” of Z chromosome with underrepresentation of female-biased genes and slow divergence of sex chromosomes of paleognaths might be related to their distinctive mode of sexual selection targeting females that evolved in their common ancestors.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Journal of Genetics and Genomics |
| Vol/bind | 49 |
| Udgave nummer | 2 |
| Sider (fra-til) | 109-119 |
| Antal sider | 11 |
| ISSN | 1673-8527 |
| DOI | |
| Status | Udgivet - 2022 |
Bibliografisk note
Funding Information:
We also would like to thank Gary Graves from Smithsonian Institute, Robb T. Brumfield and Donna L. Dittman from Louisiana State University Museum of Natural Science, Jack Withrow and Andy Kratter from Florida Museum of Natural History, and Mariel L. Campbell and Ariel M. Gaffney from the Museum of Southwestern Biology, University of New Mexico, for providing bird DNA samples for this work. Q.Z. was supported by the National Natural Science Foundation of China (31722050, 31671319, 32061130208), the Natural Science Foundation of Zhejiang Province (LD19C190001), and the European Research Council Starting Grant (grant agreement 677696). G.Z. was supported by Strategic Priority Research Program of the Chinese Academy of Sciences (XDB31020000, XDB13000000), International Partnership Program of Chinese Academy of Sciences (152453KYSB20170002), Carlsberg foundation (CF16-0663), and Villum Foundation (25900).
Funding Information:
We also would like to thank Gary Graves from Smithsonian Institute, Robb T. Brumfield and Donna L. Dittman from Louisiana State University Museum of Natural Science, Jack Withrow and Andy Kratter from Florida Museum of Natural History, and Mariel L. Campbell and Ariel M. Gaffney from the Museum of Southwestern Biology, University of New Mexico, for providing bird DNA samples for this work. Q.Z. was supported by the National Natural Science Foundation of China ( 31722050 , 31671319, 32061130208 ), the Natural Science Foundation of Zhejiang Province ( LD19C190001 ), and the European Research Council Starting Grant (grant agreement 677696 ). G.Z. was supported by Strategic Priority Research Program of the Chinese Academy of Sciences ( XDB31020000 , XDB13000000 ), International Partnership Program of Chinese Academy of Sciences ( 152453KYSB20170002 ), Carlsberg foundation ( CF16-0663 ), and Villum Foundation ( 25900 ).
Publisher Copyright:
© 2021 Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China
ID: 287607185