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dc.contributor.authorVan Belleghem, Stevenen
dc.contributor.authorBaquero, Margaritaen
dc.contributor.authorPapa, Riccardoen
dc.contributor.authorSalazar, Camiloen
dc.contributor.authorMcMillan, W Owenen
dc.contributor.authorCounterman, Brian Aen
dc.contributor.authorJiggins, Chrisen
dc.contributor.authorMartin, Simonen
dc.date.accessioned2018-06-12T09:59:57Z
dc.date.available2018-06-12T09:59:57Z
dc.date.issued2018-10en
dc.identifier.issn0962-1083
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/276898
dc.description.abstractSex chromosomes are disproportionately involved in reproductive isolation and adaptation. In support of such a ‘large-X’ effect, genome scans between recently diverged populations or species pairs often identify distinct patterns of divergence on the sex chromosome compared to autosomes. When measures of divergence between populations are higher on the sex chromosome compared to autosomes, such patterns could be interpreted as evidence for faster divergence on the sex chromosome, i.e. ‘faster-X’, or barriers to gene flow on the sex chromosome. However, demographic changes can strongly skew divergence estimates and are not always taken into consideration. We used 224 whole genome sequences representing 36 populations from two Heliconius butterfly clades (H. erato and H. melpomene) to explore patterns of Z chromosome divergence. We show that increased divergence compared to equilibrium expectations can in many cases be explained by demographic change. Among Heliconius erato populations, for instance, population size increase in the ancestral population can explain increased absolute divergence measures on the Z chromosome compared to the autosomes, as a result of increased ancestral Z chromosome genetic diversity. Nonetheless, we do identify increased divergence on the Z chromosome relative to the autosomes in parapatric or sympatric species comparisons that imply post-zygotic reproductive barriers. Using simulations, we show that this is consistent with reduced gene flow on the Z chromosome, perhaps due to greater accumulation of incompatibilities. Our work demonstrates the importance of taking demography into account in order to interpret patterns of divergence on the Z chromosome, but nonetheless provides evidence to support the Z chromosome as a strong barrier to gene flow in incipient Heliconius butterfly species.
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.publisherWiley-Blackwell
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectSex Chromosomesen
dc.subjectAnimalsen
dc.subjectButterfliesen
dc.subjectGenetics, Populationen
dc.subjectModels, Geneticen
dc.subjectCentral Americaen
dc.subjectSouth Americaen
dc.subjectFemaleen
dc.subjectMaleen
dc.subjectGenetic Speciationen
dc.subjectGene Flowen
dc.titlePatterns of Z chromosome divergence among Heliconius species highlight the importance of historical demography.en
dc.typeArticle
prism.endingPage3872
prism.issueIdentifier19en
prism.publicationDate2018en
prism.publicationNameMolecular ecologyen
prism.startingPage3852
prism.volume27en
dc.identifier.doi10.17863/CAM.24180
dcterms.dateAccepted2018-02-20en
rioxxterms.versionofrecord10.1111/mec.14560en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-10en
dc.contributor.orcidVan Belleghem, Steven [0000-0001-9399-1007]
dc.contributor.orcidSalazar, Camilo [0000-0001-9217-6588]
dc.contributor.orcidMcMillan, W Owen [0000-0003-2805-2745]
dc.contributor.orcidCounterman, Brian A [0000-0003-2724-071X]
dc.contributor.orcidJiggins, Christopher [0000-0002-7809-062X]
dc.contributor.orcidMartin, Simon [0000-0002-0747-7456]
dc.identifier.eissn1365-294X
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idIsaac Newton Trust (1523(r))
pubs.funder-project-idEuropean Research Council (339873)
cam.orpheus.successThu Jan 30 13:00:41 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International