Opsin evolution in damselfish: convergence, reversal, and parallel evolution across tuning sites

Hofmann, Christopher M., Marshall, N. Justin, Abdilleh, Kawther, Patel, Zil, Siebeck, Ulrike E. and Carleton, Karen L. (2012) Opsin evolution in damselfish: convergence, reversal, and parallel evolution across tuning sites. Journal of Molecular Evolution, 75 3-4: 79-91. doi:10.1007/s00239-012-9525-0

Author Hofmann, Christopher M.
Marshall, N. Justin
Abdilleh, Kawther
Patel, Zil
Siebeck, Ulrike E.
Carleton, Karen L.
Title Opsin evolution in damselfish: convergence, reversal, and parallel evolution across tuning sites
Journal name Journal of Molecular Evolution   Check publisher's open access policy
ISSN 0022-2844
Publication date 2012-10
Sub-type Article (original research)
DOI 10.1007/s00239-012-9525-0
Volume 75
Issue 3-4
Start page 79
End page 91
Total pages 13
Place of publication Secaucus, United States
Publisher Springer
Collection year 2013
Language eng
Abstract The visual system plays a role in nearly every aspect of an organism's life history, and there is a direct link between visual pigment phenotypes and opsin genotypes. In previous studies of African cichlid fishes, we found evidence for positive selection among some opsins, with sequence variation greatest for opsins producing the shortest and longest wavelength visual pigments. In this study, we examined opsin evolution in the closely related damselfish family (Pomacentridae), a group of reef fishes that are distributed widely and have a documented fossil record of at least 50 million years (MY). We found increased functional variation in the protein sequences of opsins at the short- and long-wavelength ends of the visual spectrum, in agreement with the African cichlids, despite an order of magnitude difference in the ages of the two radiations. We also reconstructed amino acid substitutions across opsin tuning sites. These reconstructions indicated multiple instances of parallel evolution, at least one definitive case of convergent evolution, and one evolutionary reversal. Our findings show that the amino acids at spectral tuning sites are labile evolutionarily, and that the same codons evolve repeatedly. These findings emphasize that the aquatic light environment can shape opsin sequence evolution. They further show that phylogenetic approaches can provide important insights into the mechanisms by which natural selection "tinkers" with phenotypes.
Keyword Ancestral state reconstruction
Parallel evolution
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 19 October 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2013 Collection
School of Biomedical Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 22 Nov 2012, 10:10:30 EST by Debra McMurtrie on behalf of Queensland Brain Institute