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DNA Analysis Shows the Evolution of Dog Breeds

‘…[A] team of researchers has assembled the most comprehensive genomic map on dogs to date. The results were published in the journal Cell Reports. Researchers gathered blood samples or mouth scrapings from 1,346 dogs, of 161 breeds, over the course of 20 years. The dogs came from Europe, North America, Africa, and Asia.Turns out, dogs were bred into certain types or “clades.” There are 23 in all. As humans migrated to different places, dogs went with them, even into the Americas across the Bering Strait. Today, all the dogs that we know of in North America originated in Europe. The European breeds superseded the original ones or interbred with them….’

Source: Big Think