Evolutionary history of dogs discovered by genetic analysis.
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Park and colleagues evaluated the genomes of 1,346 dogs across 161 breeds to assemble a large family tree, describing the evolutionary histories of dogs. The team’s analysis found that 161 dog breeds fell into 23 genetically determined groups, or cadastres.

Peruvian dogs (a New World dog), also appeared in the genomes of some dogs.
“They show that by using genetics, you can really tell what was going on after [the producers] were doing these races,” said Elinor Karlsson, a computer biologist at the University of Massachusetts Medical Center who was not involved In work. “The whole period between [mitigation and today] has been a black box.”
The new canine family tree can help veterinarians discover genetic risk factors for the disease.