华北和云南现代人类头骨的欧亚人种特征

以往的研究表明,在3000-2000年前,"西方基因"已经在我国多个地区存在,这些"西方基因"是经由新疆流向内地的。为探讨这些"西方基因"在中国现代人群中的存在情况,本文对现代华北和云南人类头骨上的欧亚人种特征表现状况作了检查和比较。结果表明:1)欧亚人种特征在现代华北头骨标本和云南头骨标本中都能够检测到。这提示了"西方基因"不仅曾经流向华北,也流向中国西南地区的云南;2)华北头骨所代表的这一人群,在欧亚人种特征平均出现率(AFOERC)上并不比大约3000年前的殷墟人群高。这很可能是由于该华北人群与带有"西方基因"的外界人群往来有限,因而并无更多的"西方基因"流入的缘故;3)云南头骨标本比华北头骨标本在AFOERC上低得多;这可能是该云南人群与当地其他人群发生过频繁的基因交流而弱化了其原有的AFOERC的缘故。

An Examination of Eurasian Racial Characters in Modern Human Skulls from North China and Yunnan

To detect possible gene flow from west Eurasia, the Eurasian racial characters are examined and the Average Frequencies of Eurasian Racial Characters (AFOERC) are calculated for modern cranial samples from North China and Yunnan. The results show that: 1) Eurasian racial characters can be found in the samples from North China and from Yunnan as well; 2) The AFOERC of North China sample is not higher than that of ancient sample of Yin Dynasty, which indicates that there were not more Western genes flowed into the population of North China in the last 3000 years; 3) The AFOERC in Yunnan sample is much lower than in the sample from North China, which may be a result of gene exchange between Yunnan and local surrounding populations.