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Genomic architecture of parallel ecological divergence: Beyond a single environmental contrast
Univ Gothenburg, Dept Marine Sci, Ctr Marine Evolutionary Biol, Gothenburg, Sweden;Univ Copenhagen, Globe Inst, Evolutionary Genet Sect, Copenhagen, Denmark.
Univ Sheffield, Dept Anim & Plant Sci, Sheffield, S Yorkshire, England.
Univ Gothenburg, Dept Marine Sci Tjarno, Ctr Marine Evolutionary Biol, Stromstad, Sweden.ORCID iD: 0000-0003-0176-7986
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular Evolution. Uppsala University, Science for Life Laboratory, SciLifeLab. Univ Gothenburg, Dept Marine Sci, Ctr Marine Evolutionary Biol, Gothenburg, Sweden.
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2019 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 5, no 12, article id eaav9963Article in journal (Refereed) Published
Abstract [en]

The study of parallel ecological divergence provides important clues to the operation of natural selection. Parallel divergence often occurs in heterogeneous environments with different kinds of environmental gradients in different locations, but the genomic basis underlying this process is unknown. We investigated the genomics of rapid parallel adaptation in the marine snail Littorina saxatilis in response to two independent environmental axes (crab-predation versus wave-action and low-shore versus high-shore). Using pooled whole-genome resequencing, we show that sharing of genomic regions of high differentiation between environments is generally low but increases at smaller spatial scales. We identify different shared genomic regions of divergence for each environmental axis and show that most of these regions overlap with candidate chromosomal inversions. Several inversion regions are divergent and polymorphic across many localities. We argue that chromosomal inversions could store shared variation that fuels rapid parallel adaptation to heterogeneous environments, possibly as balanced polymorphism shared by adaptive gene flow.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2019. Vol. 5, no 12, article id eaav9963
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Genetics
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URN: urn:nbn:se:uu:diva-402851DOI: 10.1126/sciadv.aav9963ISI: 000505069600008PubMedID: 31840052OAI: oai:DiVA.org:uu-402851DiVA, id: diva2:1387525
Funder
Swedish Research Council, 217-2008-1719Swedish Research Council Formas, 217-2008-1719EU, European Research Council, AdG-693030-BARRIERSKnut and Alice Wallenberg FoundationEU, Horizon 2020, 754411/797747EU, Horizon 2020, 706376The Royal Swedish Academy of Sciences, CR2015-0079Available from: 2020-01-22 Created: 2020-01-22 Last updated: 2020-01-22Bibliographically approved

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