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Originally Posted by Ruth4Truth
Thank you for this; I can always count on you for this kind of thing. I read the initial report that came out about Yamnaya, but it wasn't in a scientific journal, so -- didn't have much of the kind of detail I'm interested in.
So, what about R1a, and the high incidence of it in Russia and Poland? It must also have come from the Pontic steppes. How do those two pictures fit together?
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Yes R1a also. None found in Yamnaya yet but it most likely will appear if they get samples from further north. It looks like R1b men just moved en mass for some reason and more ended up on the western side of the continent. Possibly they might be able to explain more in the future.
Samara was also R1b so obviously all that area had a lot of R1b in the past. In Europe Corded Ware is R1a and Bell Beaker R1b and they both have significant Steppe admixture.
This was from the paper linked above "Summarizing the results from the Yamnaya males, all seven belonged to haplogroup R1b1a. Six of these could be further assigned to haplogroup R1b1a2a, and five of these to haplogroup R1b1a2a2. The uniformity of R1b Y-chromosomes in this sample suggests a patrilineal organization of the Yamnaya, or at least of the people who were given expensive Kurgan burials. We cannot exclude the presence of other haplogroups in the general population, or in other individuals located elsewhere in the expansive Yamnaya horizon23. We also emphasize the absence of M412 (the dominant lineage within haplogroup R-M269 in Europe) in this sample, as well as the absence of the R1a haplogroup which was detected in the Corded Ware and Late Bronze Age Halberstadt individual from central Europe. A survey of other European steppe groups may reveal the more immediate patrilineal kin of the major founding lineages of modern European R1a and R1b chromosomes."
There should be more coming about about this shortly.