My analysis suggests there was an insertion of steppic DNA South of the Caucasus by the middle Bronze Age, with a profile best matching a 50:50 mix of Srubnayaoltavka; and that Srubnaya has a profile in turn best matching a mix of Chalcolithic NE Ukraine and early Lithuanian Corded Ware.
Could this be a sign of R1a-Z93 lineages mopping up principally R1b communities (i) around Belarus early 3rd millennium BC, and then (ii) Central Steppe mid 3rd millennium, and then (iii) Caucasus late 3rd millennium? This is the route that I would propose for the main Middle Eastern subclades of R1a. Is there any DNA data that would refine this proposal?
Could this be a sign of R1a-Z93 lineages mopping up principally R1b communities (i) around Belarus early 3rd millennium BC, and then (ii) Central Steppe mid 3rd millennium, and then (iii) Caucasus late 3rd millennium? This is the route that I would propose for the main Middle Eastern subclades of R1a. Is there any DNA data that would refine this proposal?