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dc.contributor.authorBradbury, Ian R.-
dc.contributor.authorBowman, Sharen-
dc.contributor.authorBorza, Tudor-
dc.contributor.authorSnelgrove, Paul V. R.-
dc.contributor.authorHutchings, Jeffrey A.-
dc.contributor.authorBerg, Paul R.-
dc.contributor.authorLighten, Jackie-
dc.contributor.authorRuzzante, Daniel E.-
dc.contributor.authorBentzen, Paul-
dc.contributor.authorRodriguez-Ezpeleta, Naiara-
dc.contributor.authorTaggart, Christopher-
dc.date.accessioned2017-10-23T11:15:27Z-
dc.date.available2017-10-23T11:15:27Z-
dc.date.issued2014-
dc.identifierISI:000342685600006-
dc.identifier.issn1932-6203-
dc.identifier.urihttp://dspace.azti.es/handle/24689/327-
dc.description.abstractHybrid zones provide unprecedented opportunity for the study of the evolution of reproductive isolation, and the extent of hybridization across individuals and genomes can illuminate the degree of isolation. We examine patterns of interchromosomal linkage disequilibrium (ILD) and the presence of hybridization in Atlantic cod, Gadus morhua, in previously identified hybrid zones in the North Atlantic. Here, previously identified clinal loci were mapped to the cod genome with most (similar to 70\%) occurring in or associated with (<5 kb) coding regions representing a diverse array of possible functions and pathways. Despite the observation that clinal loci were distributed across three linkage groups, elevated ILD was observed among all groups of clinal loci and strongest in comparisons involving a region of low recombination along linkage group 7. Evidence of ILD supports a hypothesis of divergence hitchhiking transitioning to genome hitchhiking consistent with reproductive isolation. This hypothesis is supported by Bayesian characterization of hybrid classes present and we find evidence of common F1 hybrids in several regions consistent with frequent interbreeding, yet little evidence of F2 or backcrossed individuals. This work suggests that significant barriers to hybridization and introgression exist among these co-occurring groups of cod either through strong selection against hybrid individuals, or genetic incompatibility and intrinsic barriers to hybridization. In either case, the presence of strong clinal trends, and little gene flow despite extensive hybridization supports a hypothesis of reproductive isolation and cryptic speciation in Atlantic cod. Further work is required to test the degree and nature of reproductive isolation in this species.-
dc.description.sponsorshipResearch was supported in part by Genome Canada, Genome Atlantic and the Atlantic Canada Opportunities Agency through the Atlantic Cod Genomics and Broodstock Development Project. Supporting organizations include industrial partners (e.g., Ag West Bio Tech, SUN Microsystems, IBM, and pharmaceutical and biotechnology companies), and a complete list of supporting partners can be found at www.codgene.ca/partners.php. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. The funders, including commercial partners, had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Research funding and support was also provided by an NSERC Strategic Grant on Connectivity in Marine Fish and an NSERC Discovery Grant.-
dc.language.isoeng-
dc.publisherPUBLIC LIBRARY SCIENCE-
dc.subjectWITH-GENE-FLOW-
dc.subjectGADUS-MORHUA-
dc.subjectGENOMIC DIVERGENCE-
dc.subjectECOLOGICAL SPECIATION-
dc.subjectANOPHELES-GAMBIAE-
dc.subjectPOPULATION-STRUCTURE-
dc.subjectMARINE FISH-
dc.subjectLOCAL ADAPTATION-
dc.subjectISLANDS-
dc.subjectHITCHHIKING-
dc.titleLong Distance Linkage Disequilibrium and Limited Hybridization Suggest Cryptic Speciation in Atlantic Cod-
dc.typeArticle-
dc.identifier.journalPLOS ONE-
dc.format.volume9-
dc.contributor.funderGenome Canada-
dc.contributor.funderGenome Atlantic-
dc.contributor.funderAtlantic Canada Opportunities Agency through the Atlantic Cod Genomics and Broodstock Development Project-
dc.contributor.funderNSERC-
dc.identifier.doi10.1371/journal.pone.0106380-
Aparece en las tipos de publicación: Artículos científicos



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