Examination of hemiplasy, homoplasy and phylogenetic discordance in chromosomal evolution of the bovidae

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dc.contributor.authorRobinson T.J.
dc.contributor.authorRopiquet A.
dc.date.accessioned2011-10-13T16:58:44Z
dc.date.available2011-10-13T16:58:44Z
dc.date.issued2011
dc.description.abstractRobertsonian chromosomal fusions predominate in shaping the genomes of many species of Bovidae. These and other cytogenetic data (from 52 taxa representing 51 species and 9 tribes of Bovidae) were (i) examined for usefulness in defining phylogenetic relationships and (ii) subsequently mapped to a consensus tree based on mitochondrial and nuclear DNA gene sequences with divergence dates of the corresponding species calculated from cytochrome b sequences. This permitted persistence time estimates for the various rearrangements. The chromosomal data resulted in an unsupported higher-level topology, but with recognition of the monophyly of some genera and tribes within Bovidae. The distribution and temporal spread of character states on the species tree is suggestive of a restricted role for hemiplasy (the retention of an ancestral chromosomal polymorphism through multiple speciation events) and for introgression (resulting from secondary contact among taxa), processes that can potentially lead to phylogenetic discordance. We conclude that the most probable interpretation for these data is that genuine karyotypic homoplasy predominates, but that hemiplasy (and/or introgression) is a realistic hypothesis for the observed patterns of several shared characters in Bovidae. © The Author(s) 2011. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. All rights reserved.
dc.description.versionArticle
dc.identifier.citationSystematic Biology
dc.identifier.citation60
dc.identifier.citation4
dc.identifier.citationhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79959389576&partnerID=40&md5=cad927f74d2eda0ba9af1d6f0eaaceef
dc.identifier.issn10635157
dc.identifier.other10.1093/sysbio/syr045
dc.identifier.urihttp://hdl.handle.net/10019.1/16840
dc.subjectBovids
dc.subjectchromosomes
dc.subjectevolution
dc.subjecthemiplasy
dc.subjecthomoplasy
dc.subjecthybridization
dc.subjectlineage sorting
dc.subjectsystematics
dc.titleExamination of hemiplasy, homoplasy and phylogenetic discordance in chromosomal evolution of the bovidae
dc.typeArticle
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