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Data from a 40,000-year-old man in China reveals complicated genetic history of Asia
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[QUOTE]Originally posted by Djehuti: [QB] [QUOTE]Originally posted by BrandonP: [qb] Makes sense. All these populations must have undergone their own trajectories of evolution since diverging (e.g. the whole thing about Negritos having short stature might be an adaptation to the rainforest environments that would have expanded in Southeast Asia after the LGM), but I can see Andamanese peoples like the Onge somewhat resembling the immediate ancestors of East Asians. [/qb][/QUOTE]The term 'Negrito' is a racialized catchphrase for small statured blacks of the Asian region in general. It's just like the term 'Pygmies' of Africa. Yet genetics has shown that just as African Pygmies were actually genetically heterogeneous populations of different origins, so too were the 'Negritos' as proven by the 2017 Jinam et al. [URL=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5597900/]paper[/URL]. [IMG]https://www.researchgate.net/profile/Timothy-Jinam/publication/319536863/figure/fig1/AS:537305753624576@1505115082508/Principal-component-analysis-plot-of-A-Andamanese-Jarawa-and-Onge-Malaysian.png[/IMG] [IMG]https://www.researchgate.net/profile/Timothy-Jinam/publication/319536863/figure/fig2/AS:537305753624577@1505115082548/Results-of-ADMIXTURE-assuming-k-14-2-to-k-14-7-Each-vertical-line-represents-an.png[/IMG] Ironically the Andamanese are genetically closest to the ancestors of 'Mongoloids' or modern East Asians than all other 'Negrito' populations though Andamanese are also highest in ASI whereas East Asians show more affinity to ANI. So there are still gaps in our autosomal knowledge as shown in the map. [IMG]https://i.ibb.co/9sdBGYj/Asian-PCAmap.png[/IMG] By the way, Larena at al. 2021 paper shows [URL=https://pubmed.ncbi.nlm.nih.gov/34388371/]Philippine Ayta possess the highest level of Denisovan ancestry in the world[/URL]. Before this discovery, the highest Denisovan ancestry known was in Papuans followed by Australian Aborigines so there was clearly a north-south gradient in Denisovan ancestry. [/QB][/QUOTE]
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