Utility of nuclear DNA intron markers at lower taxonomic levels: Phylogenetic resolution among nine Tragelaphus spp.

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dc.contributor.authorWillows-Munro S.
dc.contributor.authorRobinson T.J.
dc.contributor.authorMatthee C.A.
dc.date.accessioned2011-05-15T15:57:22Z
dc.date.available2011-05-15T15:57:22Z
dc.date.issued2005
dc.description.abstractPhylogenetic relationships among the nine spiral-horn antelope species of the African bovid tribe Tragelaphini are controversial. In particular, mitochondrial DNA sequencing studies are not congruent with previous morphological investigations. To test the utility of nuclear DNA intron markers at lower taxonomic levels and to provide additional data pertinent to tragelaphid evolution, we sequenced four nuclear DNA segments (MGF, PRKCI, SPTBN, and THY) and combined these data with mitochondrial DNA sequences from three genes (cytochrome b, 12S rRNA, and 16S rRNA). Our molecular supermatrix comprised 4682 characters which were analyzed independently and in combination. Parsimony and model based phylogenetic analyses of the combined nuclear DNA data are congruent with those derived from the analysis of mitochondrial gene sequences. The corroboration between nuclear and mtDNA gene trees reject the possibility that genetic processes such as lineage sorting, gene duplication/deletion and hybrid speciation account for the conflict evident in the previously published phylogenies. It suggests rather that the morphological characters used to delimit the Tragelaphid species are subject to convergent evolution. Divergence times among species, calculated using a relaxed Bayesian molecular clock, are consistent with hypotheses proposing that climatic oscillations and their impact on habitats were the major forces driving speciation in the tribe Tragelaphini. © 2005 Elsevier Inc. All rights reserved.
dc.description.versionArticle
dc.identifier.citationMolecular Phylogenetics and Evolution
dc.identifier.citation35
dc.identifier.citation3
dc.identifier.issn10557903
dc.identifier.other10.1016/j.ympev.2005.01.018
dc.identifier.urihttp://hdl.handle.net/10019.1/10363
dc.subjectmitochondrial DNA
dc.subjectanimal
dc.subjectantelope
dc.subjectarticle
dc.subjectbiological model
dc.subjectcell nucleus
dc.subjectclassification
dc.subjectcomparative study
dc.subjectDNA sequence
dc.subjectgenetics
dc.subjectintron
dc.subjectmethodology
dc.subjectmolecular evolution
dc.subjectmolecular genetics
dc.subjectnucleotide sequence
dc.subjectphylogeny
dc.subjectspecies difference
dc.subjectstatistical analysis
dc.subjectstatistical model
dc.subjectAnimals
dc.subjectAntelopes
dc.subjectBase Sequence
dc.subjectCell Nucleus
dc.subjectData Interpretation, Statistical
dc.subjectDNA, Mitochondrial
dc.subjectEvolution, Molecular
dc.subjectIntrons
dc.subjectLikelihood Functions
dc.subjectModels, Genetic
dc.subjectMolecular Sequence Data
dc.subjectPhylogeny
dc.subjectSequence Analysis, DNA
dc.subjectSpecies Specificity
dc.subjectAntelope
dc.subjectBovidae
dc.subjectTragelaphus
dc.titleUtility of nuclear DNA intron markers at lower taxonomic levels: Phylogenetic resolution among nine Tragelaphus spp.
dc.typeArticle
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