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蓝海人类学在线 Ryan WEI's Forum of Anthropology

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汉藏亲缘程度和遗传分离时间

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发表于 2017-1-6 17:03 | 显示全部楼层 |阅读模式
本帖最后由 litis 于 2017-1-6 17:12 编辑

Ancestral Origins and Genetic History of Tibetan Highlanders——————————————————————————————
一.藏人有6%左右非现代人类基因,似乎比其他东亚民族略多一点。
二.估算的汉藏分离时间比之前研究要早,大约9000到15000年前(之前的文献是2750年前,语言学估计的是6000年前)。
三.藏族和土族关系最近,然后是彝族——纳西——蒙古(不清楚是哪里的蒙古)——北方汉族——土家族——南方汉族——苗族——日本——鄂伦春——京族——畲族——柬埔寨——傣族——泰族——维吾尔族——拉祜族等。总体来说介于蒙古语族和藏缅民族之间,与汉族土家族关系还是比较密切的但并非最亲近的。
四.台湾原住民的admixture分析结果虽然祖源成分极其纯粹(几乎是100%的东亚-东南亚主成分),但是他们遗传确实很特殊(不知道是不是隔离太久的缘故),泰雅人和藏族的Fst比藏族与Nganasan的Fst还大;接近和Koryak人的遗传距离。
五.意大利人似乎还是偏南欧的,北意人都比南法偏南很多。。这里的Russians_North的亚洲成分比乌克兰多得多,比芬兰都多。。
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The origin of Tibetans remains one of the most contentious puzzles in history, anthropology, and genetics. Analyses of deeply sequenced (30×-60×) genomes of 38 Tibetan highlanders and 39 Han Chinese lowlanders, together with available data on archaic and modern humans, allow us to comprehensively characterize the ancestral makeup of Tibetans and uncover their origins. Non-modern human sequences compose 656% of the Tibetan gene pool and form unique haplotypes in some genomic regions, where Denisovan-like, Neanderthal-like, ancient-Siberian-like, and unknown ancestries are entangled and elevated. The shared ancestry of Tibetan-enriched sequences dates back to 6562,000-38,000 years ago, predating the Last Glacial Maximum (LGM) and representing early colonization of the plateau. Nonetheless, most of the Tibetan gene pool is of modern human origin and diverged from that of Han Chinese 6515,000 to 659,000 years ago, which can be largely attributed to post-LGM arrivals. Analysis of 65200 contemporary populations showed that Tibetans share ancestry with populations from East Asia (6582%), Central Asia and Siberia (6511%), South Asia (656%), and western Eurasia and Oceania (651%). Our results support that Tibetans arose from a mixture of multiple ancestral gene pools but that their origins are much more complicated and ancient than previously suspected. We provide compelling evidence of the co-existence of Paleolithic and Neolithic ancestries in the Tibetan gene pool, indicating a genetic continuity between pre-historical highland-foragers and present-day Tibetans. In particular, highly differentiated sequences harbored in highlanders' genomes were most likely inherited from pre-LGM settlers of multiple ancestral origins (SUNDer) and maintained in high frequency by natural selection.
 楼主| 发表于 2017-1-8 11:51 | 显示全部楼层
楼主別傻了,如果藏语和汉语分离9000到15000年,根本不可能看出同源关系

而且缅彝语先和汉藏语分离,然后才到汉语藏语分离。如果藏语和汉语分离9000到15000年,那么缅彝语和汉藏语分离时间岂不更早?
Manaus 发表于 2017-1-8 02:44
那您可真机智啊,只有您知道汉藏语同源么。
另外这是论文成果,不是我的观点。
 楼主| 发表于 2017-1-9 01:22 | 显示全部楼层
语言是语言,常染是常染。
二者完全两回事。
西欧人和印度人,常染分化恐怕2万年都不止了,不同样说着印欧语?

比如,拉祜人也说藏缅语族,可是他的常染离藏族就非常远了。
不论是楼主的资料,还是以前的其他资 ...
無路山 发表于 2017-1-8 18:15
是啊,觉得拉祜族和泰雅人都很有意思。
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