First dogs came from Asia
By KATARINA AHLFORT - SCIENCE BLOG
Added: Thu, 24 Nov 2011 04:17:44 UTC
Researchers at KTH say they have found further proof that the wolf ancestors of today’s domesticated dogs can be traced to southern East Asia — findings that run counter to theories placing the cradle of the canine line in the Middle East.
Dr Peter Savolainen, KTH researcher in evolutionary genetics, says a new study released Nov. 23 confirms that an Asian region south of the Yangtze River was the principal and probably sole region where wolves were domesticated by humans.
Data on genetics, morphology and behaviour show clearly that dogs are descended from wolves, but there’s never been scientific consensus on where in the world the domestication process began. “Our analysis of Y-chromosomal DNA now confirms that wolves were first domesticated in Asia south of Yangtze River — we call it the ASY region — in southern China or Southeast Asia”, Savolainen says.
The Y data supports previous evidence from mitochondrial DNA. “Taken together, the two studies provide very strong evidence that dogs originated in the ASY region”, Savolainen says.
Archaeological data and a genetic study recently published in Nature suggest that dogs originate from the Middle East. But Savolainen rejects that view. “Because none of these studies included samples from the ASY region, evidence from ASY has been overlooked,” he says.
Peter Savolainen and PhD student Mattias Oskarsson worked with Chinese colleagues to analyse DNA from male dogs around the world. Their study was published in the scientific journal Heredity.
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