Limited number of patrilines in horse domestication |
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Authors: | Lindgren Gabriella Backström Niclas Swinburne June Hellborg Linda Einarsson Annika Sandberg Kaj Cothran Gus Vilà Carles Binns Matthew Ellegren Hans |
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Institution: | Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Norbyv?gen 18D, SE-752 36 Uppsala, Sweden. |
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Abstract: | Genetic studies using mitochondrial DNA (mtDNA) have identified extensive matrilinear diversity among domestic horses. Here, we show that this high degree of polymorphism is not matched by a corresponding patrilinear diversity of the male-specific Y chromosome. In fact, a screening for single-nucleotide polymorphisms (SNPs) in 14.3 kb of noncoding Y chromosome sequence among 52 male horses of 15 different breeds did not identify a single segregation site. These observations are consistent with a strong sex-bias in the domestication process, with few stallions contributing genetically to the domestic horse. |
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