Historic Canine DNA Exhibits Early Unfold Across the Globe

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Ancient Dog DNA Shows Early Spread Around the Globe

Among other things, Dr. Larson found it particularly fascinating that after dogs were domesticated, and even while they were sometimes breeding with wolves, no new wolf DNA was introduced into their genome.

Pigs, however, were brought to Europe by farmers in Anatolia, for example. But the genes of these first domesticated pigs have been completely lost and have been replaced by the genes of the European wild boar, although the pigs remained domesticated animals.

While dogs mate, no new wolf genes survive over the years. One way, said Dr. Larson, is that "wolfiness" just doesn't fit an animal as close to humans as a dog. Pigs can be a little wild, but “if you're a dog and you have a bit of a wolf in you, that's not a good thing and these things get hit on the head very quickly or run away or disappear, but they won't attract not integrated into the dog population. "

Dr. Skoglund said another fascinating and unexplained finding from the genomic data was how quickly dogs spread and diversified around the world, such that 11,000 years ago not only were there five different lineages, but some fossil DNAs also showed that those lineages were present were started to recombine.

"How did this happen?" he said. "We don't know of any human expansion in old people that would have made this possible on the order of 15 to 30,000 years ago."

For the past 11,000 years, he said, the canine genomes showed evidence similar to the human genomes of Anatolian farmers who moved to Europe. But then there was the sudden loss of diversity in dogs that began about 4,000 years ago.

Migrations from the steppes also changed the human genome in Europe, but had almost no influence on the canine genome. Conversely, migrations from the steppes to the east have shaped the genome history of dogs, but not humans.

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