莎伦博士分析了三种不同类型的DNA,博伊科博士说,这是第一次对如此众多、如此多样化的犬只进行研究,包括了161个品种的逾4500只狗,以及来自38个国家的549只乡村狗。因此研究人员能够分析出哪些现代犬只的地理群落在基因上最接近其祖先群体。基因研究确定了现代人类起源于东非,而他们也采用大致一样的方式,确定了犬类的起源地是中亚。
The analysis, Dr. Boyko said, pointed to Central Asia, including Mongolia and Nepal, as theplace where “all the dogs alive today come from. The data did not allow precise dating of theorigin, he said, but showed it occurred at least 15,000 years ago. They reported their findingsMonday in Proceedings of the National Academy of Sciences.
博伊科博士说,分析显示,包括蒙古和尼泊尔在内的中亚地区是“目前所有尚存的犬种的来源地。他说这些数据不足以对起源进行精确测年,但从中可以看到是在至少1.5万年前。本周一,他们的报告发表在《美国国家科学院院刊》(Proceedings of the National Academy of Sciences)上。
Greger Larson of Oxford University, who is leading a large international effort to analyze ancientDNA from fossilized bones, said he was impressed by the scope of the study. “It’s really greatto see not just the sheer number of street dogs, but also the geographic breadth and thenumber of remote locations where the dogs were sampled, he said in an email. He also praisedthe sampling of different kinds of DNA and the analytic methods.
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