唧唧堂编辑二朵2013-12-05 1:46 AM

Complete Mitochondrial Genomes of Ancient Canids Suggest a European Origin of Domestic Dogs 完整的古代犬科动物线粒体基因组表明了家犬的欧洲起源

Abstract The geographic and temporal origins of the domestic dog remain controversial, as genetic data suggest a domestication process in East Asia beginning 15,000 years ago, whereas the oldest doglike fossils are found in Europe and Siberia and date to >30,000 years ago. We analyzed the mitochondrial genomes of 18 prehistoric canids from Eurasia and the New World, along with a comprehensive panel of modern dogs and wolves. The mitochondrial genomes of all modern dogs are phylogenetically most closely related to either ancient or modern canids of Europe. Molecular dating suggests an onset of domestication there 18,800 to 32,100 years ago. These findings imply that domestic dogs are the culmination of a process that initiated with European hunter-gatherers and the canids with whom they interacted. 论文摘要 家犬的地理和时间起源仍处争议中,因为遗传数据表明犬类在东亚的驯化过程早在一万五千年前就开始了,而在欧洲和西伯利亚发现的最古老的类狗化石则可以追溯至三万年前。我们分析了来自欧亚大陆和新大陆的18只史前犬类动物的线粒体,同时也分析了包含现代犬类和狼的综合对照组。所有现代犬类的线粒体基因组系统发生性地最接近于欧洲古代或现代的犬类动物。分子年代鉴定显示早在18,800至32,100年前在那就开始了驯化过程。这些研究发现意味着家犬的出现是由欧洲狩猎采集者们与犬类动物互动过程中的顶峰阶段引起。

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