Well, if this pans out in the long run, so much for all the disdain for Basal Eurasian because it was a late entrant from Africa into the holy precincts of the "Caucasian" world. Now, all of a sudden, eastern Europe was the refugia of Basal Eurasian and it didn't exist anywhere else. Am I the only one who finds these mental contortions so amusing? Good-bye, I guess, as well, to yDna "E" bringing it into the Levant very late from East or North Africa. Don't people keep track of how often they've been arrogantly wrong about so much? Apparently not.
On to more serious matters. I long ago speculated that since U2 has such a center of gravity in the Caucasus, the U2 in Kostenki very probably came from there. Now we are able to study his autosomes, and he is supposedly partly Basal Eurasian. It does all fit, if the data is being interpreted properly. I'm also reminded of all those old threads of Dienekes' talking about the Caucasus as the "Womb of Nations". I doubted it at the time, thinking that the Caucasus was more likely a refuge for defeated group after defeated group.
However, if Basal Eurasian spanned the Caucasus (we know it had to be south of the Caucasus as well, as the Neolithic farmers who set sail for Europe a la Paschou et al carried big doses of it) and then spread with the earliest farmers (and perhaps the Indo-Europeans) all the way west to the Atlantic, to India, south into Africa, and far north as well, then the general area could indeed be seen as the "Womb of Nations".
This is their "tree" by the way. Nice to see that there's at least general agreement with the Lazaridis et al tree. MHG seems to equal WHG, and NEOL seems to equal EEF. Was it really necessary to change the labels? Ego, ego, everywhere.
http://1.bp.blogspot.com/-jlF6eSOWmnk/VFwpvCk9MjI/AAAAAAAAJ1o/lkmfDp204OU/s1600/F2.large.jpg
Actually, however, I think a certain amount of caution is warranted. See Dienekes:
http://www.dienekes.blogspot.com/2014/11/genome-of-kostenki-14-upper-paleolithic.html
(This is the graphic he is discussing:
http://www.sciencemag.org/content/early/2014/11/05/science.aaa0114/F1.large.jpg)
- The statistic D(Mbuti, East Asia; HG, K14) is less than 0. So, there's some link between HG and East Asians. Is this because of Basal Eurasian admixture in K14 or due to some admixture between Caucasoids and Mongoloids after the time of K14? (this might cause the lower dates of European-East Asian splits alluded to above).
- The statistic D(Mbuti, East Asia; NEOL, K14) is 0. So, East Asians don't "prefer" either Neolithic Europeans (NEOL) or K14. I guess the value of this statistic depends on how much Basal Eurasian the different populations have and what's the relationship between East Asians, K14, and the non-Basal Eurasian part in K14.
- Finally, "NEOL component for K14 in ADMIXTURE". I think they are referring to the "Middle East" component (right). This may be Basal Eurasian ancestry, or maybe because K14 is so old, it pre-dates the European/Middle Eastern divide and its ancestry isn't attracted to either Europe or the Middle East, so it gets ancestry from both (and many other colors besides)
I also think I want to wait and see whether the earliest Samara genomes contain any Basal Eurasian. What if Kostenki 14 was an autosomal dead end, as indeed is his mtDna? (So, although I am U2, I am not descended from him on my mtDna line.) There is also the expressed concern in the paper about possible "contamination" issues.
Also, we don't know where else Basal Eurasian was lurking during the UP and later on in time in the Mesolithic. If it made it over the Caucasus, what would have prevented it from crossing the Hellespont or sailing on a raft to the Aegean before farming ever developed? In that case, the incoming farmers from the Middle East would have been meeting long lost cousins.
We'll just have to wait and see. This is why this field of study never gets boring...endless surprises, and then, of course, there's the endless amusement provided by some of the more prolific writers on the subject. It's the gift that keeps on giving.
The clustering analysis in the graphic is also interesting. They divide the ancient samples into Hunter Gatherer, Middle East, Central Asia etc. By Middle East do they mean Basal Eurasian? They certainly are using Basal Eurasian as a category in other parts of the Supplement, so why didn't they divide it up that way for the cluster analysis? Or are they using it to mean Neolithic farmer? That doesn't seem right, either. I'm still plowing through the Supplement. If someone can find text to that effect that would be helpful.
It's worthy of note, I think, that they find African in Ajv 58 and La Brana (as did the Dodecad analyses), as well as a smidgeon in Motala. (This is why admixture analyses that scrub European genomes of anything which they conveniently label "noise" are so unhelpful, by the way.) Interestingly, there is none or at least barely a trace in Stuttgart or Otzi (although I think Dodecad found some), so did the African they found in the Gok sample mostly come from the additional HG? I do hate to say I told you so, but it also seems from this analysis that North Italians carry a substantial UP remnant in their genomes, although not as high as that of the French or the French Basues. I knew that all those "CM" phenotypes couldn't be totally unrelated to genotype, even if it's not a perfect correlation, and nor could they all have been brought in by the Indo-Europeans.