Reconstructing the origin and spread of horse domestication in the Eurasian steppe.
Abstract: Despite decades of research across multiple disciplines, the early history of horse domestication remains poorly understood. On the basis of current evidence from archaeology, mitochondrial DNA, and Y-chromosomal sequencing, a number of different domestication scenarios have been proposed, ranging from the spread of domestic horses out of a restricted primary area of domestication to the domestication of numerous distinct wild horse populations. In this paper, we reconstruct both the population genetic structure of the extinct wild progenitor of domestic horses, Equus ferus, and the origin and spread of horse domestication in the Eurasian steppes by fitting a spatially explicit stepping-stone model to genotype data from >300 horses sampled across northern Eurasia. We find strong evidence for an expansion of E. ferus out of eastern Eurasia about 160 kya, likely reflecting the colonization of Eurasia by this species. Our best-fitting scenario further suggests that horse domestication originated in the western part of the Eurasian steppe and that domestic herds were repeatedly restocked with local wild horses as they spread out of this area. By showing that horse domestication was initiated in the western Eurasian steppe and that the spread of domestic herds across Eurasia involved extensive introgression from the wild, the scenario of horse domestication proposed here unites evidence from archaeology, mitochondrial DNA, and Y-chromosomal DNA.
Publication Date: 2012-05-07 PubMed ID: 22566639PubMed Central: PMC3361400DOI: 10.1073/pnas.1111122109Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This research paper investigates the early history and development of horse domestication, proposing that horse domestication likely originated in the western part of the Eurasian steppe. The researchers used archaeological evidence, and mitochondrial and Y-chromosomal DNA from over 300 horses in northern Eurasia, to create a model of this early domestication and spread.
Research Process
- The authors conducted a comprehensive research using archaeological findings, mitochondrial DNA, and Y-chromosomal sequencing. Their study aimed to provide a clearer understanding of how, where, and when horse domestication began in the Eurasian steppe.
- They scrutinized various theories and scenarios that have been previously proposed about horse domestication. These ranged from hypotheses about domestic horses spreading from a single primary area to proposals about the domestication of distinct wild horse populations.
- By compiling and analyzing genotypic data from more than 300 horses sampled across Northern Eurasia, they were able to construct a spatially explicit stepping-stone model, which allowed them to map the genetic structure across different horse populations and trace their routes of dispersal.
Findings
- The researchers found substantial evidence pointing to a population expansion of Equus ferus, the wild precursor to domestic horses, from Eastern Eurasia around 160,000 years ago. This likely reflects the colonization of Eurasia by this species.
- The best-fitting scenario according to their model suggests that horse domestication first started in the western part of the Eurasian steppe. As the domestic horse population spread out of this area, it appears that domestic herds were repeatedly replenished with local wild horeses.
Conclusion
- The research concluded that horse domestication was likely to have been initiated in the western Eurasian steppe. They also found that the widespread dispersal of domestic horses across Eurasia involved extensive intermingling and breeding with local wild horse populations, otherwise known as introgression.
- By substantiating the proposed scenario of the origins of horse domestication and its spread, the authors have managed to coherently unite evidence from multiple sources: archaeology, mitochondrial DNA, and Y-chromosomal DNA.
Cite This Article
APA
Warmuth V, Eriksson A, Bower MA, Barker G, Barrett E, Hanks BK, Li S, Lomitashvili D, Ochir-Goryaeva M, Sizonov GV, Soyonov V, Manica A.
(2012).
Reconstructing the origin and spread of horse domestication in the Eurasian steppe.
Proc Natl Acad Sci U S A, 109(21), 8202-8206.
https://doi.org/10.1073/pnas.1111122109 Publication
Researcher Affiliations
- Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, United Kingdom. vmw23@cam.ac.uk
MeSH Terms
- Algorithms
- Animals
- Animals, Domestic / genetics
- Animals, Wild / genetics
- Archaeology
- Asia
- DNA, Mitochondrial / genetics
- Europe
- Genetics, Population
- Horses / genetics
- Microsatellite Repeats / genetics
- Models, Genetic
- Y Chromosome / genetics
Grant Funding
- BB/H005854/1 / Biotechnology and Biological Sciences Research Council
Conflict of Interest Statement
The authors declare no conflict of interest.
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