狗的驯化历史可分为两个阶段,原始的狗最初由它们“野生的祖先(即灰狼)”驯化而来。在第二阶段,原始种类被进一步选择,形成了很多具有特殊能力的狗。
The researchers collected the genome sequences of 58 canids from across the world, including samples from Europe, Africa, southern and northern parts of East Asia, the Middle East, Siberia and the Americas. They found that after evolving for several thousand years in East Asia, a subgroup of dogs radiated out of southern East Asia about 15,000 years ago to the Middle East, Africa and Europe.
研究人员收集了来自世界各地的58种犬科动物的基因组序列,包括来自欧洲、非洲、东亚的南部和北部、中亚、西伯利亚和美洲的样本。他们发现,狗类在东亚经历了几千年的发展,大约在1.5万年前,狗的一个子群从东亚南部发展开来,到达中亚、非洲和欧洲。
"One of these out of Asia lineages then migrated back to northern China and made a series of admixtures with endemic East Asian lineages, before traveling to the Americas," said the researchers. "Our study, for the first time, reveals the extraordinary journey that the domestic dog has traveled on this planet during the past 33,000 years."
研究人员说:“这些脱离了亚洲血统的狗,有一些又迁移回到了中国北方,形成了一系列有东亚血统的杂交狗。之后,它们又迁徙到了美洲地区。我们的研究首次揭示了驯化狗在过去3.3万年里在地球上非同寻常的旅程。”
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