• DOI:10.1046/J.0268-9146.2003.01044.X
• Corpus ID: 11932020

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

@article{Wallner2003FixedND,
  title={Fixed nucleotide differences on the Y chromosome indicate clear divergence between Equus przewalskii and Equus caballus.},
  author={Barbara Wallner and Gottfried Brem and M. M{\"u}ller and Roland Achmann},
  journal={Animal genetics},
  year={2003},
  volume={34 6},
  pages={
          453-6
        }
}

• B. Wallner, G. Brem, +1 author R. Achmann
• Published 1 December 2003
• Biology, Medicine
• Animal 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.