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Patterns of Z chromosome divergence among Heliconius species highlight the importance of historical demography

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dc.creatorVan Belleghem, Steven M.spa
dc.creatorBaquero, Margaritaspa
dc.creatorPapa, Riccardospa
dc.creatorSalazar, Camilo
dc.creatorMcMillan, W. Owenspa
dc.creatorCounterman, Brian A.spa
dc.creatorJiggins, Chris D.spa
dc.creatorMartin, Simon H.spa
dc.creator.googleVan Belleghem, Steven M.spa
dc.creator.googleBaquero, Margaritaspa
dc.creator.googlePapa, Riccardospa
dc.creator.googleSalazar, Camilospa
dc.creator.googleMcMillan, W. Owenspa
dc.creator.googleCounterman, Brian A.spa
dc.creator.googleJiggins, Chris D.spa
dc.creator.googleMartin, Simon H.spa
dc.date.accessioned2019-02-12T19:31:29Z
dc.date.available2019-02-12T19:31:29Z
dc.date.created2018spa
dc.date.issued2018
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 and 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, that is “faster-X”, 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 postzygotic 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 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. © 2018 The Authors. Molecular Ecology Published by John Wiley & Sons Ltdeng
dc.format.mimetypeapplication/pdf
dc.identifier.doi10.1111/mec.14560
dc.identifier.issnISSN 0962-1083
dc.identifier.urihttp://repository.urosario.edu.co/handle/10336/19049
dc.language.isoengspa
dc.relation.citationEndPage3872
dc.relation.citationStartPage3852
dc.relation.citationTitleMolecular Ecology
dc.relation.citationVolumeVol. 27
dc.relation.ispartofMolecular Ecology, ISSN:0962-1083, Vol. 27 (2018) pp. 3852-3872spa
dc.relation.urihttps://onlinelibrary.wiley.com/doi/epdf/10.1111/mec.14560spa
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.rights.accesoAbierto (Texto completo)spa
dc.source.bibliographicCitationArias, C.F., Muñoz, A.G., Jiggins, C.D., Mavarez, J., Bermingham, E., Linares, M., A hybrid zone provides evidence for incipient ecological speciation in Heliconius butterflies (2008) Molecular Ecology, 17, pp. 4699-4712. , https://doi.org/10.1111/j.1365-294X.2008.03934.xspa
dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR
dc.subjectSex Chromosomespa
dc.subjectCompared Autosomesspa
dc.subjectGene Flowspa
dc.subjectChromosome Comparedspa
dc.subject.ddcAntropología física
dc.subject.lembCromosomas sexualesspa
dc.subject.lembFlujo de genesspa
dc.titlePatterns of Z chromosome divergence among Heliconius species highlight the importance of historical demographyspa
dc.title.alternativenullvaluespa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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