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现代人定居南太平洋地区分批迁徙理论的常染色体相关文献

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发表于 2013-6-11 23:03 | 显示全部楼层 |阅读模式
An Aboriginal Australian genome reveals separate human dispersals into Asia.
Rasmussen M, et al. (2011)
Science 334(6052):94–98.



We show that Aboriginal Australians are descendants of an early human dispersal into eastern Asia, possibly 62,000 to 75,000 years ago. This dispersal is separate from the one that gave rise to modern Asians 25,000 to 38,000 years ago. We also find evidence of gene flow between populations of the two dispersal waves prior to the divergence of Native Americans from modern Asian ancestors.





Denisova Admixture and the First Modern Human Dispersals into Southeast Asia and Oceania
David Reich et al.

Aboriginal Australians, Near Oceanians, Polynesians, Fijians, east Indonesians, and Mamanwa (a “Negrito” group from the Philippines) have all inherited genetic material from Denisovans, but mainland East Asians, western Indonesians, Jehai (a Negrito group from Malaysia), and Onge (a Negrito group from the Andaman Islands) have not.These results indicate that Denisova gene flow occurred into the common ancestors of New Guineans, Australians, and Mamanwa but not into the ancestors of the Jehai and Onge and suggest that relatives of present-day East Asians were not in Southeast Asia when the Denisova gene flow occurred. Our finding that descendants of the earliest inhabitants of Southeast Asia do not all harbor Denisova admixture is inconsistent with a history in which the Denisova interbreeding occurred in mainland Asia and then spread over Southeast Asia, leading to all its earliest modern human inhabitants. Instead, the data can be most parsimoniously explained if the Denisova gene flow occurred in Southeast Asia itself. Thus, archaic Denisovans must have lived over an extraordinarily broad geographic and ecological range, from Siberia to tropical Asia.



大体是指南太平洋地区澳大利亚人种是大约6.2-7.5万年前到达亚洲东部人群的后裔,而现代东亚人则在2.5-3.8万年前形成,而在美洲人从亚洲人分离之前,两个亚太族群发生过血统交流。


而当丹尼索瓦人(或其近亲)与东南亚族群普遍发生混血之时,东亚人的先祖并不在东南亚地区。


汇总ing`
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