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Originally Posted by
MarkoZ
Yeah, it'd be quite difficult to imagine that a historical event could have caused such a significant shift. I think one of the reason for this apparent change could be that the authors are comparing samples from a single southern Lebanese site to a synthesized modern cluster. In their f4 analysis they find that additional affinity to the Mal'ta Boy and Swiss Bichon most differentiates Lebanese from Sidon_BA, so the modern cluster might simply reflect pre-existing internal diversity. Perhaps it's as simple decreasing Natufian affinity as you go north.
I'm not quite sure I understand, Marko. This sample is from Sidon, which seems to be pretty much in the middle of Lebanon, but at any rate it seems to be very typical of the Bronze Age Levant as a whole.
" The PCA shows that Sidon_BA clusters with three individuals from Early Bronze Age Jordan(Jordan_BA) found in a cave above the Neolithic site of ‘Ain Ghazal and probably associated with anEarly Bronze Age village close to the site.13 This suggests that people from the highly differentiatedurban culture on the Levant coast and inland people with different modes of subsistence werenevertheless genetically similar, supporting previous reports that the different cultural groups whoinhabited the Levant during the Bronze Age, such as the Ammonites, Moabites, Israelites andPhoenicians, each achieved their own cultural identities but all shared a common genetic and ethnicroot with Canaanites.15 Lazaridis et al.13 reported that Jordan_BA can be modelled as mixture ofNeolithic Levant (Levant_N) and Chalcolithic Iran (Iran_ChL)."
Also, haven't the modern Turks been modeled as 15-20% steppe? Given that, I don't think 7% steppe sounds outlandish for Lebanon. One thing that pulls these areas away from Europe are the very high levels of "Iranian" call it Neolithic or Chalcolithic or whatever. The other factor for the Levant populations is SSA. In some analyses the Christian Lebanese have up to 4 and 5%, mostly but not all East African, to the best of my recollection.
The Palestinians pull even further away because of yet more SSA. Part of that may be due to the slave trade, but there are also documented migrations of Bedouin tribes into the area during the Muslim period. SSA ancestry is so divergent that it has a big effect in PCAs, on FST etc.
It will be interesting to see how the Samaritans compare to this ancient sample. If they do cluster with the sample, they might do for a "Levant Jewish" proxy until the real thing comes along.
Interesting again how close the Assyrians and the Iraqi and Iranian Jews are to this sample. I never did buy the idea that these "eastern" Jews picked up a lot of foreign ancestry in Iraqi and Iran over the years. I always believed, instead, that they were probably pretty close to the original "real deal". We have a relatively large community of them in a nearby town and I know a few socially. I'm going to let them know about this study. They'll be thrilled.
Non si fa il proprio dovere perchè qualcuno ci dica grazie, lo si fa per principio, per se stessi, per la propria dignità. Oriana Fallaci