Evolutionary history of the genus Capra (Mammalia, Artiodactyla): Discordance between mitochondrial DNA and Y-chromosome phylogenies

The systematics of the genus Capra remain controversial in spite of studies conducted using morphology, mtDNA, and allozymes. Here, we assess the evolutionary history of Capra (i) using phylogenetic analysis of two nuclear genes located on the Y-chromosome and (ii) previously published and new cytoc...

Full description

Saved in:
Bibliographic Details
Published in:Molecular phylogenetics and evolution 2006-09, Vol.40 (3), p.739-749
Main Authors: Pidancier, Nathalie, Jordan, Steve, Luikart, Gordon, Taberlet, Pierre
Format: Article
Language:English
Subjects:
Africa
Amelogenin
Animals
Artiodactyla
Asia
Biodiversity
Biodiversity and Ecology
Capra
Capra hircus
Caprinae
Cytochromes c - genetics
Dental Enamel Proteins - genetics
DNA, Mitochondrial - analysis
Ecology, environment
Environmental Sciences
Europe
Evolution, Molecular
Geography
Goat domestication
Goats - anatomy & histology
Goats - genetics
Horns - anatomy & histology
Introgression
Life Sciences
Male
Mammalia
Phylogeny
Y Chromosome
Y-chromosome evolution
Zinc Fingers - genetics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The systematics of the genus Capra remain controversial in spite of studies conducted using morphology, mtDNA, and allozymes. Here, we assess the evolutionary history of Capra (i) using phylogenetic analysis of two nuclear genes located on the Y-chromosome and (ii) previously published and new cytochrome b sequences. For the Y-chromosome phylogeny, we sequenced segments from the amelogenin (AMELY) and zinc finger (ZFY) genes from all of the eight wild taxa and from domestic goats ( Capra hircus). Phylogenetic analysis of the Y-chromosome data revealed two well-defined clades. The domestic goat ( C. hircus), the bezoar ( Capra aegagrus), and the markhor ( C. falconeri) belong to one clade (ML bootstrap value [BP]: 98%), suggesting that domestic goats originated from one or both of these wild species. The second clade (ML BP: 92%) is comprised of all the other wild species. Horn morphology is generally concordant with the Y-chromosome phylogeny. The mtDNA data also revealed two well-defined clades. However, the species in each clade are different from those inferred from the Y-chromosome data. To explain the discordance between Y-chromosome and mtDNA phylogenies, several hypotheses are considered. We suggest that a plausible scenario involves mtDNA introgression between ancestral taxa before the relatively recent colonization of Western Europe, the Caucasus Mountains, and East Africa by Capra populations.
ISSN:1055-7903
1095-9513
DOI:10.1016/j.ympev.2006.04.002