Angela
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Because if we take a look at the ADMIXTURe, before the Sardinians/EFF get their own component, they are split between Mesolithic HG and Bedouin :
In the first link, the North-European component appears mostly as Atlantic-Baltic, and in turn, the Atlantic-Baltic appears mostly as Northern-European. In the second link there seems to be an error between the bars and the legend of colors, considering that African appears as 100% South-Asian or Southern as 100% Atlantic-Baltic. In any case, yes there is an common shared ancient ancestry between the north-euro components and the Caucasus ones.
Of course it has to do with western-mediterranean, the difference is not genetic drift, since these populations (SW Euros) have the lowest levels of the ANE ancestry of all West-Eurasia, meaning there have been different sources of hunter-gatherer ancestry as well as near-east farmer ancestry.
What iberian farmer ? There is none, In any case, yes they were most likely EEF
Yes, Wilhelm, there is indeed an Iberian farmer, from Burgos, to be precise, and from only 4,000 years ago, (2000 BC) and he's a lot like Oetzi, who is a lot like the Sardinians, but more Southern, to use the old terms, and we know the EEF numbers for Sardinians. There will surely be some differences between the genomes of the various ancient EEFs, but I doubt they'll be earthshattering. The paper should be out soon. I'm sure someone will run his genome through the new tools and models, and then we'll get the precise figures.
Oddný Ósk Sverrisdóttir et al., A late Neolithic Iberian farmer exhibits genetic affinity to Neolithic Scandinavian farmers and a Bronze Age central European farmer
The spread of farming, the neolithisation process, swept over Europe after the advent of the farming lifestyle in the near east approximately 11,000 years ago. However the mode of transmission and its impact on the demographic patterns of Europe remains largely unknown. In this study we obtained : 66,476,944 bp of genomic DNA from the remains of a 4000 year old Neolithic farmer from the site of El Portalón, 15 km east of Burgos, Spain. We compared the genomic signature of this individual to modern-day populations as well as the few Neolithic individuals that has produced large-scale autosomal data. The Neolithic Portalón individual is genetically most similar to southern Europeans, similar to a Scandinavian Neolithic farmer and the Tyrolean Iceman. In contrast, the Neolithic Portalón individual displays little affinity to two Mesolithic samples from the near-by area, La Brana, demonstrating a distinct change in population history between 7,000 and 4,000 years ago for the northern Iberian Peninsula.
http://www.diva-portal.org/smash/rec...d=diva2:665597
As to the Lazaridis et al paper, the authors know and evaluate the importance of the data in their own paper from the old Admixture tool. They then proceed to use other statistical modeling, and when they write about the amount of the H/G component in EEF, they make it quite clear that they doubt the upper bound around 30%. You linked to the supplemental material yourself, even if you didn't quote all of it, or provide the tables.
You also might want to take a look at this chart where Dienekes interpreted his components in terms of one another...North European is about 60% Atlantic Med, a sliver of Siberian, and the rest, approaching 40%, is Gedrosian. Atlantic Med is over 90% Caucasus.
http://tinypic.com/view.php?pic=2v8isnd&s=5#.Us7_obRdDRY
Or how about this one for Atlantic-Baltic:
http://tinypic.com/view.php?pic=2enba7s&s=5#.Us8Bs7RdDRY
Atlantic Baltic comes out as a sliver of Amerindian, close to 70% Caucasus/Gedrosia, and about 30% Southern.
There's nothing confusing about the graphs whatsoever, although I think the use of this method for ancient ancestry purposes is now rather limited.
Finally, the neolithic spread from the south-east Wilhelm. EEF is an east Mediterranean component with some western H/G added before it ever got to Iberia. Even if these farmers picked up a little more western H/G when they got there, it wouldn't effect the numbers from this paper. The EEF figures we are discussing for the modern European populations are based on the genes of this LBK woman.
You've had a good run, Wilhelm, but when someone is in a hole, the advice is usually to stop digging.
The data is what it is...and I don't understand what the problem is with accepting it.