The origin of the dog

      Dog originated in wolves, and has been a consensus, but around the birthplace of the specific and time are mixed. So far, the earliest fossil evidence of dogs in Germany from 14,000 years ago, a fossil mandible, another one is from the Middle East about 12,000 years ago, a small canid skeleton fossils, which is the origin of archaeological evidence to support the dog in the South-West Asia or Europe, while the other hand, the study identified characteristics of the dog's bones may be prompted to dogs originated from wolves, the question arises of East Asian origin of the dog, said. In addition, different varieties of dogs in morphology is extremely rich in diversity, seems to tend to the dog originated in different geographical groups, the hypothesis of a wolf. So, archeology alone, it is difficult to provide reliable clues to the origin of the dog.

Sino-Swiss research team of scientists studied 654 dogs from the five continents, analyze their body's inherited through maternal called "mitochondrial DNA" genetic material of the base array and found that these dogs have almost identical genes . In their view, human and dog friendly origins can be traced back 1.5 million years ago, when humans first started in East Asia domesticated animals such as wolves, and in the long years of gradually domesticated dogs brought to Europe, and even through the white Order Strait into the Americas.

That East Asia is because the East Asian region, the most abundant type of dog's genes, scientists have inferred through genetic testing should be in the region is the birthplace of the dog, rather than in the past people have always thought that the Middle East. Bidesawo Brennan said: "Many of the early research is based on a small amount of archaeological material in the Middle East that the region is the origin of the dog, in fact, there is only a number of other domesticated animals, not dogs." Meanwhile, the and the wolf genes through comparison, they think 1.5 million years ago, from several different wolf differentiated from the dog.

The study was conducted by two international research team go hand in hand to carry out the. On the other hand, the United States and Peru and other countries of the scientists of the research team compared the North and South America continent and in Asia, Europe and the European colonists arrived in the dog before the American continent, Alaska and other places in Latin America and the survival of the dog's base arrangement. Found in Latin America and Sweden, part of the dog genes from Europe and Asia over the last wolf. This is part of the gene in the 15th century, European settlers arrived in the Americas prior to the dog who appeared in the Americas. They believed that dogs originated in East Asia and expanded to the whole of Asia and Europe, then in the 14,000 to 1.2 million years ago from the American continent, the first settlers brought to the Americas across the Bering Strait.

Sweden, a livestock expert Pozhan Sen believed that East Asia were the first domesticated dogs, this speculation is "very convincing" and the American continent, the first settlers took the dog, which is shown in the previous dog for many years and Asians to live together.