Abstract
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.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Base Sequence
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DNA, Mitochondrial / genetics
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Genetic Variation / genetics*
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Horses / classification
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Horses / genetics*
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Male
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Molecular Sequence Data
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Phylogeny
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Probability
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Species Specificity
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Y Chromosome / genetics*
Associated data
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GENBANK/AY225598
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GENBANK/AY228242
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GENBANK/AY228244
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