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Convergent evolution of the genomes of marine mammals
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
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2015 (English)In: Nature Genetics, ISSN 1061-4036, E-ISSN 1546-1718, Vol. 47, no 3, p. 272-275Article in journal (Refereed) Published
Abstract [en]

Marine mammals from different mammalian orders share several phenotypic traits adapted to the aquatic environment and therefore represent a classic example of convergent evolution. To investigate convergent evolution at the genomic level, we sequenced and performed de novo assembly of the genomes of three species of marine mammals (the killer whale, walrus and manatee) from three mammalian orders that share independently evolved phenotypic adaptations to a marine existence. Our comparative genomic analyses found that convergent amino acid substitutions were widespread throughout the genome and that a subset of these substitutions were in genes evolving under positive selection and putatively associated with a marine phenotype. However, we found higher levels of convergent amino acid substitutions in a control set of terrestrial sister taxa to the marine mammals. Our results suggest that, whereas convergent molecular evolution is relatively common, adaptive molecular convergence linked to phenotypic convergence is comparatively rare.

Place, publisher, year, edition, pages
2015. Vol. 47, no 3, p. 272-275
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Genetics
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URN: urn:nbn:se:uu:diva-248826DOI: 10.1038/ng.3198ISI: 000350327900020PubMedID: 25621460OAI: oai:DiVA.org:uu-248826DiVA, id: diva2:801243
Available from: 2015-04-08 Created: 2015-04-08 Last updated: 2017-12-04Bibliographically approved

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Foote, Andrew D.Lindblad-Toh, KerstinVijay, NagarjunWolf, Jochen B. W.

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Evolutionary BiologyScience for Life Laboratory, SciLifeLabDepartment of Medical Biochemistry and Microbiology
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