https://sites.google.com/site/levitedna ... -genealogy
Previously, it had been speculated that Slavs injected their Slavic haplogroup R1a into the Jewish community, apparently through Levites, and that from there it was propagated to other Ashkenazi Jews. Among some geneticists, there still reigns a belief that haplogroup R1a is Slavic in origin. For example, in a 2010 article (Atzmon et al., 2010), the population geneticists write, “these impurities could occur from Ukrainians, Poles or Russians.” But the authors, discussing the haplogroup R1a in Jews, did not bother to look at the Jewish haplotypes, which differ markedly from those of the Slavic haplogroup R1a. Let’s look at this on the more precise 111-marker haplotypes.
The base (i.e., the apparent ancestral) 111-marker haplotype among modern R1a Jews with a common ancestor (who, as mentioned above, lived approximately 1,300 years ago) is as follows:
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Between the R1a Jews and the R1a Slavs there are 20 mutations (marked in bold), which shows that the common ancestor of Slavs and Jews lived 20/0.198 = 101 → 112 generations apart (based on 25 years per generation, as described above), i.e., 2,800 years. This, in turn, gives the two R1a groups of Jews and Slavs a common ancestor (2,800 + 4,900 +1,300) / 2 = 4,500 years ago. This is in the time period of the Aryans. (Here 0.198 is the mutation rate constant for the 111-marker haplotypes, and the arrow represents the tabular correction for back mutations.)
Thus, the Slavs have nothing to do with the origins of R1a Jews. R1a was brought by the Aryans. The Aryans came out of the Russian plains. One wave of them headed south through the Caucasus to Mesopotamia, where they came into close contact, literally, with the ancestors of modern Jews. Thus, haplogroup R1a entered the Jewish milieu.