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Ancient Egyptians DNA is Less Sub Saharan than modern Egyptian DNA.
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[QUOTE]Originally posted by Elmaestro: [QB] [QUOTE]Originally posted by Nodnarb: This is the response I received from Sarkoboros when I commented on [URL=http://sarkoboros.net/2017/03/ancient-human-dna-and-proteomes-at-saa-2017/]his post[/URL]: [QUOTE]I find a lot to object to in Pagani et al.’s piece. Masking leaves me uneasy even when the target isn’t the vast majority of your samples’ ancestry (roughly 80%, of modern Egyptian ancestry, iirc more in Copts, seems to be Eurasian) and we have a more constrained sense of what the reference populations ought to be. See the discussion of the analogously mostly European Aleut samples in the SI for Reich et al. 2012. Even had it worked perfectly, I’m not sure what point it makes. [b]We know that the non-Eurasian ancestry in modern Egyptians is a palimpsest[/b], and the admixture signal most readily retrieved by linkage disequilibrium methods (I would bet there are earlier events beyond easy resolution) [b]looks like a pulse input of “Nilotic” ancestry just 25 generations ago. (I’m quite sure however that this isn’t the sole contribution and expect heterogeneity across Egypt in sources, proportions, and timing.)[/b] Not to acknowledge this — that’s a major problem. I agree that “Middle Eastern” is ambiguous, and it’ll be important to parse this more carefully. How much of this is “Basal Eurasian” (which may have had a very long tenure in North Africa and perhaps even diverged from “African” lineages while still geographically within the continent) and how much is specifically West Eurasian? I doubt it’s entirely the former. Since even Natufian foragers ~12ka had substantial West European hunter-gatherer-related ancestry, I would not be surprised to find it in the earliest Dynastic Egyptians.[/QUOTE][/QUOTE]It seems most people are on the same page, however, I would be incredibly surprised if we found "WHG-like" ancestry in Early dynastic Egyptians, where would it come from? I find it incredible how we found a way to lump two source populations separated by over 10 millennia together. The unidirectional dispersal pattern of a population such as Basal Eurasian is enigmatic to me because it seems improbable in the first place with all things considered. This component is really faint in non-Eurasian admixed extant populations of eastern Africa, for a population that is postulated to have emerged south east Sudan or the Sahara by some. Anything that remotely resembles or smells like a possible PreOOA Basal Eurasian Geneset is accompanied by peripheral OOA admixture, notably West Asian. I'm basically saying that Basal Eurasian as a lingering pre-OOA component won't be distinguished if its here or there or nowhere at all & WHG-like ancestry in the nile valley should be indicative of introgression from early Levantine or other Eurasian populations alike. I also forgot the fact that it was the possible Nilotic component via Maasai that was estimated to have mixed in 750ya, If the variables are consistent we might see signals of Bantu-Like/Luhya Ancestry if any SSA element persist?(henn et al 2012) - eh, its w/e, Considering the obvious & well known fact that there was a Nilotic presence in the earliest state formation of Kemet, IDK how to feel about this. - I'll just wait for more tangible info SideNote: [b]Jari & BBH[/b] What do you think about the glaring cultural differences specifically during the beginning of both near-middle eastern & Egyptian populations. [/QB][/QUOTE]
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