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[I] looked at the ongoing Dodecad v3 results to possibly correlate the spread of R-M269 to Western Europe with the autosomal evidence...[It] is consistent with an episode of gene flow into Europe from West Asia that affected Western more than Eastern Europe, which parallels the R-M269 distribution in Europe.
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In fact, those similarities do exist, albeit in a rather weak form because thousands of years passed since then. Still now most of R1b1a2 haplotypes in the Caucasus (in Armenia, Dagestan, Georgia) belong to the ancient L23 subclade (with a common ancestor in the Caucasus of around 6,000 ybp), and have a characteristic DYS393=12 allele, unlike DYS393=13 in most of European R1b1b2 haplotypes. From the Caucasus, R1b1a2-L23 and R1b1a2-M269 bearers went South over the mountains, to Anatolia (a common ancestor of 6,000 ybp), and then split into three major routes. One went further South, to Tigris and Euphrates Rivers, and became the Sumers. Many present-day Assyrians, descendants of ancient Sumers, still have their R1b1a2 haplotypes. Another went westward, across AsiaMinor, and came to Europe, to the Balkans and Mediterranean Sea region around 4500 ybp. The third group went across Northern Africa and Egypt (and,incidentally, might have left some R1b1b2 Pharaohs there) to the Atlantic and went across Gibraltar to the Iberian Peninsula around 4800 ybp. They became the Bell Beakers, and moved up North into the continental Europe. The Bell Beaker culture in Europe had lasted between about 4400 and 3800 ybp.