The exact branch of G2 found in Middle Bronze Age kurgan in Atskuri near Akhaltsikhe is now available. Its the G2-Y258395.
Its a minor branch today found among Armenians, Turks and Georgians.
The parallel branch PH1780 is predominantly Georgian and Kartvelian, except the subbranch PH311 which is more cosmopolitan.
Little bit more distant parallel branch L1264 is predominantly found in northwest Caucasus among Abkhaz-Adyghean speakers.
Given that the center of gravity of this branch G2-Y258395 is located in what is now the Turkey, its safe to assume that the real ancestor of G2-Y258395 was probably living somewhere between Ardahan and Erzurum region rather than in Atskuri. Ancient samples from northeast of Turkey are needed to confirm this.
All this three branches are part of a larger haplotype known as G2-L1266, 7800 years old. Its now safe to say that this haplotype was a Neolithic lineage that moved from south, probably from Upper Euphrates region to west and northwest Caucasus during the Neolithic period were it is found today in abundance. Another path that we cant yet fully rule out is a migration via Daghestan to north Caucasus to Maykop culture. Then a backflow to south Caucasus via western Caucasus. However this latter scenario is less likely than the first one.
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