DNA reveals how dogs became man’s best friends.
The ability to digest foods containing starch, our canine friends have developed in parallel with the development of farm thousands of years ago, the study of their DNA, but scientists are the results of the study published on the journal of the Royal Society Open Science, said on Saturday the BBC.
They assume that the dogs were domesticated in the period when the wolves arrived in human settlements, seeking food. Unlike their wolf cousins, the modern dogs are accustomed to starchy food.
The study of DNA from the bones and teeth of old dogs at archaeological sites in Europe and Asia indicates that they and several thousand years ago were able to digest food containing starch.
Study leader Dr. Morgan Olliver from Lyon believes that the cultural development of the people affected in the first domesticated animal – a dog.
Copies of the DNA of the old 8000-4000 years suggest that dogs eat food containing starch even at a time when the community of hunter-gatherers gradually generally started to be farmers. “It was an advantage for dogs that ate the remains. At the same time it is a nice example of parallel evolution of human culture (the appearance of Agriculture) and the canine genome, “said Ollivier BBC.
Although Charles Darwin believed that dogs are generated by crossing wolves, coyotes and jackals, thanks to modern science, DNA analysis and molecular biology today, we can safely say that all dogs in the world share a single common ancestor – the gray wolf.
Scientists are divided when it comes to the way that humans domesticated wolves.
Some believe that wolves hunters – gatherers used as an aid in hunting or as guards and were gradually I trained and adapted to their own needs, while others believe that the domestication began some time later when the wolves approached human settlements and began to ‘steal’ food remains, continuing to live with people.
In the new study, analyzed DNA from dog bones with eight archaeological sites in Europe and in Turkmenistan. The results support the hypothesis according to which the dogs were domesticated in the period when they are secretly entered the human settlements, while stealing food remains, at the same time adapting to human consumption.
An earlier study showed that modern dogs have a gene for digesting starch, which distinguishes them from wolves.
Molecular evidence suggests that the transformation of the gray wolf to domestic dog started happening before about 130,000 years old, but friendly relationship between humans and dogs as we know it is at least 15,000 years.
Due to the constant crossing of subspecies of wild wolves, and domestic dogs, dogs were eventually began to vary significantly from their ancestors. In addition to change the mood and adapt to the friendly people, the dogs have changed the structure of your body, experts say.