the dog was the first animal to domesticate (although we did not eat his flesh and we drank their milk us). We just became friends and colleagues. And it worked so well that it apparently domesticate twice-a discovery that changes what we knew so far about the origin of species.
http://es.gizmodo.com/los-biologos-h …
the dogs come from two different populations of wolves in two different places in the world. It suggests a new study led by Oxford University who published the journal Science Friday. Scientists do not know whether the process of domestication and artificial selection dog had begun in Europe or East Asia, but now have strong evidence that both hypotheses are valid.
To reach this conclusion, researchers analyzed the mitochondrial DNA of 59 dogs that lived less than 14,000 years ago more than 3,000. A key element of the study was the fossil found in the Neolithic passage tomb of Newgrange, Ireland: dog bone with the best preserved ancient DNA has been found to date. The scientists compared the results with archaeological evidence and the genetic information of 2,500 current dogs
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The study concludes that two populations of ancestral wolves extinct were the common origin of modern wolves and dogs. One of these populations living in Western Eurasia and another in eastern Eurasia. This means that two different groups of paleolithic humans came to the same conclusion: these intelligent animals could be bred to live and work with us. It was just domesticating and on two separate occasions.
According to research, the ancestors of the dog appeared 12,000 years ago at both ends of the continent. Six thousand years later, the ancient Asian variant of the dogs was dispersed by Europe with human and ended up mingling with European Paleolithic dogs, which partially replaced. Today, most dogs are a hybrid between European and Asian lineages: breeds like the Siberian Husky have genetic traits east and west. Others are purely Asian.
There is much work still to clarify once and for all the origin of the dog. Researchers have embarked on a second phase of the study in which combined genetic and archaeological data with a more detailed fossils of dogs to find out how it changed their morphology with respect to ancestral wolves physical analysis. At present there are about 800 breeds of this animal, more than any other species, so to reconstruct its past from its modern DNA can be a challenge. [Science]
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