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dc.contributor.authorBarth, Julia Maria Isis
dc.contributor.authorBerg, Paul Ragnar
dc.contributor.authorJonsson, Per R
dc.contributor.authorBonanomi, Sara
dc.contributor.authorCorell, Hanna
dc.contributor.authorHemmer-Hansen, Jakob
dc.contributor.authorJakobsen, Kjetill Sigurd
dc.contributor.authorJohannesson, Kerstin
dc.contributor.authorJorde, Per Erik
dc.contributor.authorKnutsen, Halvor
dc.contributor.authorMoksnes, Per-Olav
dc.contributor.authorStar, Bastiaan
dc.contributor.authorStenseth, Nils Christian
dc.contributor.authorSvedang, Henrik
dc.contributor.authorJentoft, Sissel
dc.contributor.authorAndre, Carl
dc.date.accessioned2018-02-15T09:34:53Z
dc.date.available2018-02-15T09:34:53Z
dc.date.created2017-11-14T17:45:55Z
dc.date.issued2017
dc.identifier.citationMolecular Ecology. 2017, 26 (17), 4452-4466.nb_NO
dc.identifier.issn0962-1083
dc.identifier.urihttp://hdl.handle.net/11250/2484932
dc.description.abstractAdaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod (Gadus morhua) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key traits. By combining population genomic analyses based on 12K single nucleotide polymorphisms with larval dispersal patterns inferred using a biophysical ocean model, we show that Atlantic cod individuals residing in sheltered estuarine habitats of Scandinavian fjords mainly belong to offshore oceanic populations with considerable connectivity between these diverse ecosystems. Nevertheless, we also find evidence for discrete fjord populations that are genetically differentiated from offshore populations, indicative of local adaptation, the degree of which appears to be influenced by connectivity. Analyses of the genomic architecture reveal a significant overrepresentation of a large ~5 Mb chromosomal rearrangement in fjord cod, previously proposed to comprise genes critical for the survival at low salinities. This suggests that despite considerable connectivity with offshore populations, local adaptation to fjord environments may be enabled by suppression of recombination in the rearranged region. Our study provides new insights into the potential of local adaptation in high gene flow species within fine geographical scales and highlights the importance of genome architecture in analyses of ecological adaptation.nb_NO
dc.language.isoengnb_NO
dc.titleGenome architecture enables local adaptation of Atlantic cod despite high connectivitynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber4452-4466nb_NO
dc.source.volume26nb_NO
dc.source.journalMolecular Ecologynb_NO
dc.source.issue17nb_NO
dc.identifier.doi10.1111/mec.14207
dc.identifier.cristin1514164
dc.relation.projectNorges forskningsråd: 144182nb_NO
dc.relation.projectNorges forskningsråd: 179569nb_NO
dc.relation.projectInterreg: 168975nb_NO
dc.relation.projectInterreg: 175806nb_NO
cristin.unitcode7431,23,0,0
cristin.unitnamePopulasjonsgenetikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.fulltextpostprint
cristin.qualitycode2


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