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Obviously it does not mention R1b. As far as I know, I am the only person who came up with the idea that the Maykop culture is associated with R1b people.
Originally Posted by kamani
R1b is more frequent in parts of Mesopotamia than E1b1b. For example, northern Iraq has 17% of R1b against 7.5% of E1b1b. In nearby Armenia R1b is 30% for only 6% of E1b1b. In parts of northern Anatolia, R1b also exceeds 25% of the lineages.
Anyway, the genetic landscape 6000 years ago was certainly very different to what it was today. All the Neolithic data from Europe so far only contained haplogroups G2a, I2a and E1b1b, while nowadays the most common haplogroups are R1a and R1b.
The only way to estimate which people was associated with what ancient culture is to go backward step by step. If R1b did come to Europe along with the Bronze Age, then it came from the Pontic Steppe, and before that from the Maykop culture, and before that from the Middle East (I'd say eastern Anatolia or northern Mesopotamia rather than southern Mesopotamia). There is no other logical alternative consistent with the archaeological data.
It is possible though that a small minority of G2a3b1 and perhaps even J2, T and E1b1b might have been part of the R1b migration to the North Caucasus, then to the steppes, Europe and Central Asia. That is one way of explaining why these haplogroups also turn up at very low frequencies in Central Asia, alongside R1a and R1b. But considering the clear dominance of R1b in Europe, the western branch of the Yamna culture must have been composed predominantly of R1b men, almost certainly with an R1a and G2a3b1 minority, and possibly also with an even smaller E1b1b, J2 and T minority.