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dc.contributor.authorJiggins, Chris
dc.date.accessioned2018-12-22T00:32:40Z
dc.date.available2018-12-22T00:32:40Z
dc.date.issued2019-03
dc.identifier.issn1420-9101
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/287452
dc.description.abstractSex chromosomes have different evolutionary properties compared to autosomes due to their hemizygous nature. In particular, recessive mutations are more readily exposed to selection, which can lead to faster rates of molecular evolution. Here, we report patterns of gene expression and molecular evolution for a group of butterflies. First, we improve the completeness of the Heliconius melpomene reference annotation, a neotropical butterfly with a ZW sex determination system. Then, we analyse RNA from male and female whole abdomens and sequence female ovary and gut tissue to identify sex and tissue specific gene expression profiles in H. melpomene. Using these expression profiles we compare: 1) sequence divergence and polymorphism; 2) the strength of positive and negative selection; and 3) rates of adaptive evolution, for Z and autosomal genes between two species of Heliconius butterflies, H. melpomene and H. erato. We show that the rate of adaptive substitutions is higher for Z than autosomal genes, but contrary to expectation, it is also higher for male biased than female biased genes. Additionally, we find no significant increase in the rate of adaptive evolution or purifying selection on genes expressed in ovary tissue, a heterogametic specific tissue. Our results contribute to a growing body of literature from other ZW systems that also provide mixed evidence for a fast‐Z effect where hemizygosity influences the rate of adaptive substitutions.
dc.publisherWiley-Blackwell
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleSexually dimorphic gene expression and transcriptome evolution provides mixed evidence for a fast-Z effect in Heliconius
dc.typeArticle
prism.endingPage204
prism.publicationNameJournal of Evolutionary Biology
prism.startingPage194
prism.volume32
dc.identifier.doi10.17863/CAM.34754
dcterms.dateAccepted2018-11-27
rioxxterms.versionofrecord10.1111/jeb.13410
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.licenseref.startdate2018-11-27
dc.contributor.orcidJiggins, Chris [0000-0002-7809-062X]
dc.identifier.eissn1420-9101
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Research Council (339873)
pubs.funder-project-idNERC (1364753)
cam.issuedOnline2018-12-06
cam.orpheus.successThu Jan 30 10:52:51 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