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dc.contributor.authorRodriguez-Ramilo, Silvia T
dc.contributor.authorBaranski, Matthew
dc.contributor.authorMoghadam, Hooman
dc.contributor.authorGrove, Harald
dc.contributor.authorLien, Sigbjørn
dc.contributor.authorGoddard, Mike E.
dc.contributor.authorMeuwissen, Theodorus
dc.contributor.authorSonesson, Anna Kristina
dc.identifier.citationGenetics Selection Evolution. 2019, 51 (1), .en_US
dc.description.abstractBackground: Two distinct populations have been extensively studied in Atlantic cod (Gadus morhua L.): the North‑east Arctic cod (NEAC) population and the coastal cod (CC) population. The objectives of the current study were to identify genomic islands of divergence and to propose an approach to quantify the strength of selection pressures using whole-genome single nucleotide polymorphism (SNP) data. After applying fltering criteria, information on 93 animals (9 CC individuals, 50 NEAC animals and 34 CC×NEAC crossbred individuals) and 3,123,434 autosomal SNPs were used. Results: Four genomic islands of divergence were identifed on chromosomes 1, 2, 7 and 12, which were mapped accurately based on SNP data and which extended in size from 11 to 18 Mb. These regions difered considerably between the two populations although the diferences in the rest of the genome were small due to considerable gene fow between the populations. The estimates of selection pressures showed that natural selection was substantially more important than genetic drift in shaping these genomic islands. Our data confrmed results from earlier publications that suggested that genomic islands are due to chromosomal rearrangements that are under strong selection and reduce recombination between rearranged and non-rearranged segments. Conclusions: Our fndings further support the hypothesis that selection and reduced recombination in genomic islands may promote speciation between these two populations although their habitats overlap considerably and migrations occur between them.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleStrong selection pressures maintain divergence on genomic islands in Atlantic cod (Gadus morhua L.) populationsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalGenetics Selection Evolutionen_US
dc.relation.projectAndre: Spanish Govt. Grant CGL2012-39861-C02-02en_US
dc.relation.projectAndre: INRA SELGEN funding metaprogram (Project GDivSelGen)en_US
dc.relation.projectNorges forskningsråd: 245504en_US
cristin.unitnameInstitutt for husdyr- og akvakulturvitenskap

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal