Genomic insights into the secondary aquatic transition of penguins
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Penguins lost the ability to fly more than 60 million years ago, subsequently evolving a hyper-specialized marine body plan. Within the framework of a genome-scale, fossil-inclusive phylogeny, we identify key geological events that shaped penguin diversification and genomic signatures consistent with widespread refugia/recolonization during major climate oscillations. We further identify a suite of genes potentially underpinning adaptations related to thermoregulation, oxygenation, diving, vision, diet, immunity and body size, which might have facilitated their remarkable secondary transition to an aquatic ecology. Our analyses indicate that penguins and their sister group (Procellariiformes) have the lowest evolutionary rates yet detected in birds. Together, these findings help improve our understanding of how penguins have transitioned to the marine environment, successfully colonizing some of the most extreme environments on Earth.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 3912 |
| Tidsskrift | Nature Communications |
| Vol/bind | 13 |
| Antal sider | 13 |
| ISSN | 2041-1723 |
| DOI | |
| Status | Udgivet - 2022 |
Bibliografisk note
Funding Information:
We thank the British Antarctic Survey, Institut Polaire Français (IPEV), Laura Seaman, and staff at SEALIFE Kelly Tarlton’s Aquarium, Simone Giovanardi, Misha Vorobyev, David Ainley, Jason Turuwhenua, Nic Dussex, Kieren Mitchell, Damien Fordham, Stuart Brown, James Cahill, Shanlin Liu, Yun Zhao, Fang Li, Min Wu, Yun Wang, Guangji Chen, and B10K members for sample/data collection and discussions. This project was supported by the National Key Research and Development Program of China (MOST) grant (no. 2018YFC1406901) to D.-X.Z. and the International Partnership Program of Chinese Academy of Sciences (no. 152453KYSB20170002) to G.Z. This project was also supported by the National Natural Science Foundation of China grant (no. 31901214 and No. 32170626) to S.F. and a Villum Investigator grant (no. 25900) from The Villum Foundation to G.Z. This project was also funded by the China National GeneBank.
Publisher Copyright:
© 2022, The Author(s).
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