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Selected Publication:

Type of publication: Journal Article
Type of document: Full Paper

Year: 2003

Authors: Wallner, B; Brem, G; Müller, M; Achmann, R

Title: Fixed nucleotide differences on the Y chromosome indicate clear divergence between Equus przewalskii and Equus caballus.

Source: Anim Genet. 2003; 34(6):453-456

Authors Vetmeduni Vienna:

Brem Gottfried
Müller Mathias
Wallner Barbara

Vetmed Research Units
Institute of Animal Breeding and Genetics

The phylogenetic relationship between Equus przewalskii and E. caballus is often a matter of debate. Although these taxa have different chromosome numbers, they do not form monophyletic clades in a phylogenetic tree based on mtDNA sequences. Here we report sequence variation from five newly identified Y chromosome regions of the horse. Two fixed nucleotide differences on the Y chromosome clearly display Przewalski"s horse and domestic horse as sister taxa. At both positions the Przewalski"s horse haplotype shows the ancestral state, in common with the members of the zebra/ass lineage. We discuss the factors that may have led to the differences in mtDNA and Y-chromosomal observations.

Keywords Pubmed: Animals
Base Sequence
DNA, Mitochondrial/genetics
Genetic Variation/genetics*
Molecular Sequence Data
Species Specificity
Y Chromosome/genetics*

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