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Evolution of heterogeneous genome differentiation across multiple contact zones in a crow species complex
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Uppsala University, Science for Life Laboratory, SciLifeLab.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Uppsala University, Science for Life Laboratory, SciLifeLab. Stockholm Univ, Dept Zool Populat Genet, SE-10691 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Uppsala University, Science for Life Laboratory, SciLifeLab.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Uppsala University, Science for Life Laboratory, SciLifeLab.
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2016 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 7, 13195Article in journal (Refereed) Published
Abstract [en]

Uncovering the genetic basis of species diversification is a central goal in evolutionary biology. Yet, the link between the accumulation of genomic changes during population divergence and the evolutionary forces promoting reproductive isolation is poorly understood. Here, we analysed 124 genomes of crow populations with various degrees of genome-wide differentiation, with parallelism of a sexually selected plumage phenotype, and ongoing hybridization. Overall, heterogeneity in genetic differentiation along the genome was best explained by linked selection exposed on a shared genome architecture. Superimposed on this common background, we identified genomic regions with signatures of selection specific to independent phenotypic contact zones. Candidate pigmentation genes with evidence for divergent selection were only partly shared, suggesting context-dependent selection on a multigenic trait architecture and parallelism by pathway rather than by repeated single-gene effects. This study provides insight into how various forms of selection shape genome-wide patterns of genomic differentiation as populations diverge.

Place, publisher, year, edition, pages
2016. Vol. 7, 13195
National Category
Evolutionary Biology Genetics
Identifiers
URN: urn:nbn:se:uu:diva-308915DOI: 10.1038/ncomms13195ISI: 000386500600001PubMedID: 27796282OAI: oai:DiVA.org:uu-308915DiVA: diva2:1051212
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council, 621-2010-5553EU, European Research Council, ERCStG-336536
Available from: 2016-12-01 Created: 2016-12-01 Last updated: 2016-12-01Bibliographically approved

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Vijay, NagarjunBossu, Christen M.Poelstra, Jelmer W.Weissensteiner, Matthias H.Suh, AlexanderWolf, Jochen B. W.
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Evolutionary BiologyScience for Life Laboratory, SciLifeLab
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