Date: July 5, 2018
Source: University of Illinois at Urbana-Champaign
A study reported in the
journal Science offers an enhanced view of the origins and ultimate
fate of the first dogs in the Americas. The dogs were not domesticated North
American wolves, as some have speculated, but likely followed their human
counterparts over a land bridge that once connected North Asia and the
Americas, the study found.
This is the first comprehensive
genomic study of ancient dogs in the Americas to analyze nuclear DNA, which is
inherited from both parents, along with mitochondrial DNA, which is passed down
only from mothers to their offspring. By comparing genomic signatures from 71
mitochondrial and seven nuclear genomes of ancient North American and Siberian
dogs spanning a period of 9,000 years, the research team was able to gain a
clearer picture of the history of the first canine inhabitants of the Americas.
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