Mitochondrial DNA and the Origins of the Domestic Horse

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2002 Jul 20

PMID 12130666

Citations 91

Authors

Thomas Jansen

Peter Forster

Marsha A Levine

Hardy Oelke

Matthew Hurles

Colin Renfrew

Jurgen Weber

Klaus Olek

Affiliations

Soon will be listed here.

Abstract

The place and date of the domestication of the horse has long been a matter for debate among archaeologists. To determine whether horses were domesticated from one or several ancestral horse populations, we sequenced the mitochondrial D-loop for 318 horses from 25 oriental and European breeds, including American mustangs. Adding these sequences to previously published data, the total comes to 652, the largest currently available database. From these sequences, a phylogenetic network was constructed that showed that most of the 93 different mitochondrial (mt)DNA types grouped into 17 distinct phylogenetic clusters. Several of the clusters correspond to breeds and/or geographic areas, notably cluster A2, which is specific to Przewalski's horses, cluster C1, which is distinctive for northern European ponies, and cluster D1, which is well represented in Iberian and northwest African breeds. A consideration of the horse mtDNA mutation rate together with the archaeological timeframe for domestication requires at least 77 successfully breeding mares recruited from the wild. The extensive genetic diversity of these 77 ancestral mares leads us to conclude that several distinct horse populations were involved in the domestication of the horse.

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