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标题: Nature: Aboriginal mitogenomes reveal 50,000 years of regionalism in Australia [打印本页]

作者: Tocharian_2    时间: 2017-4-13 12:44     标题: Nature: Aboriginal mitogenomes reveal 50,000 years of regionalism in Australia

Aboriginal Australians represent one of the longest continuous cultural complexes known. Archaeological evidence indicates that Australia and New Guinea were initially settled approximately 50 thousand years ago (ka); however, little is known about the processes underlying the enormous linguistic and phenotypic diversity within Australia. Here we report 111 mitochondrial genomes (mitogenomes) from historical Aboriginal Australian hair samples, whose origins enable us to reconstruct Australian phylogeographic history before European settlement. Marked geographic patterns and deep splits across the major mitochondrial haplogroups imply that the settlement of Australia comprised a single, rapid migration along the east and west coasts that reached southern Australia by 49–45 ka. After continent-wide colonization, strong regional patterns developed and these have survived despite substantial climatic and cultural change during the late Pleistocene and Holocene epochs. Remarkably, we find evidence for the continuous presence of populations in discrete geographic areas dating back to around 50 ka, in agreement with the notable Aboriginal Australian cultural attachment to their country.

http://www.nature.com/nature/journal/v544/n7649/full/nature21416.html
作者: baiyueren    时间: 2017-4-13 14:03

本帖最后由 baiyueren 于 2017-4-13 14:07 编辑

强文出来了!看来澳洲土著的历史比我之前认为的3.5万年前要早,看图上大约澳洲是在4.5万年前。
谁有能力的请下载原文共享一下。谢谢!
作者: 豢龙氏    时间: 2017-4-13 16:11

题目中五万年的说法应该是有些夸大了,文章中4.9到4.5万年的的时间是可取的。结合sahul地区两个特色父系单倍群C1b2b和K2b1与其他支系的分化时间都在45000-42000年之间,可以看出现代人确实是在45000年前左右这段时间进入sahul地区的。在那个时期的现代人应还不具备跨海迁徙的能力,比如是借助海平面下降时迁徙的。从地质学上确定在那段时间里出现的大降温事件,便可以确认现代人进入澳洲的时间点。




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