Chromosomal evolution in Raphicerus antelope suggests divergent X chromosomes may drive speciation through females, rather than males, contrary to Haldane's rule

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dc.contributor.authorRobinson, Terence J.en_ZA
dc.contributor.authorCernohorska, Halinaen_ZA
dc.contributor.authorKubickova, Svatavaen_ZA
dc.contributor.authorVozdova, Miluseen_ZA
dc.contributor.authorMusilova, Petraen_ZA
dc.contributor.authorRuiz-Herrera, Auroraen_ZA
dc.date.accessioned2023-04-03T13:52:42Z
dc.date.available2023-04-03T13:52:42Z
dc.date.issued2021-02-04
dc.descriptionCITATION: Robinson, T. J. et al. 2021. Chromosomal evolution in Raphicerus antelope suggests divergent X chromosomes may drive speciation through females, rather than males, contrary to Haldane's rule. Scientific Reports, 11:3152, doi:10.1038/s41598-021-82859-0.en_ZA
dc.descriptionThe original publication is available at https://www.nature.comen_ZA
dc.description.abstractChromosome structural change has long been considered important in the evolution of post-zygotic reproductive isolation. The premise that karyotypic variation can serve as a possible barrier to gene flow is founded on the expectation that heterozygotes for structurally distinct chromosomal forms would be partially sterile (negatively heterotic) or show reduced recombination. We report the outcome of a detailed comparative molecular cytogenetic study of three antelope species, genus Raphicerus, that have undergone a rapid radiation. The species are largely conserved with respect to their euchromatic regions but the X chromosomes, in marked contrast, show distinct patterns of heterochromatic amplification and localization of repeats that have occurred independently in each lineage. We argue a novel hypothesis that postulates that the expansion of heterochromatic blocks in the homogametic sex can, with certain conditions, contribute to post-zygotic isolation. i.e., female hybrid incompatibility, the converse of Haldane’s rule. This is based on the expectation that hybrids incur a selective disadvantage due to impaired meiosis resulting from the meiotic checkpoint network’s surveillance of the asymmetric expansions of heterochromatic blocks in the homogametic sex. Asynapsis of these heterochromatic regions would result in meiotic silencing of unsynapsed chromatin and, if this persists, germline apoptosis and female infertility.en_ZA
dc.description.urihttps://www.nature.com/articles/s41598-021-82859-0
dc.description.versionPublisher's versionen_ZA
dc.format.extent11 pages : illustrations, mapsen_ZA
dc.identifier.citationRobinson, T. J. et al. 2021. Chromosomal evolution in Raphicerus antelope suggests divergent X chromosomes may drive speciation through females, rather than males, contrary to Haldane's rule. Scientific Reports, 11:3152, doi:10.1038/s41598-021-82859-0.en_ZA
dc.identifier.issn2045-2322 (online)
dc.identifier.otherdoi:10.1038/s41598-021-82859-0
dc.identifier.urihttp://hdl.handle.net/10019.1/126763
dc.language.isoen_ZAen_ZA
dc.publisherNatureen_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectRaphicerus antelopeen_ZA
dc.subjectChromosome structural changeen_ZA
dc.subjectHybrid disfunction modelen_ZA
dc.subjectPost‑zygotic reproductive isolationen_ZA
dc.titleChromosomal evolution in Raphicerus antelope suggests divergent X chromosomes may drive speciation through females, rather than males, contrary to Haldane's ruleen_ZA
dc.typeArticleen_ZA
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