Congrats. It was a difficult one.
Three individuals who lived in the Chalcolithic era (c. 5700–6250 years BP), found at the Areni-1 ("Bird's Eye") cave in the South Caucasus mountains (present-day Vayots Dzor Province, Armenia), was also identified as belonging to haplogroup L1a.
The individual's genome also indicated that he had red hair and blue eyes.
There does seem to be a link between R1b and L1a then, how peculiar. Perhaps the R1b-Anatolian theory is wrong, and it's actually from the Zagros, and the R1b guys got their Gedrosian from migrating Westwards through Northern South Asia and Iran, before heading onto the Steppe, but this still doesn't explain CHG (unless they picked up CHG women on the way too). Also, now I think about it, is there not a discrepancy between the lack of Caucasian among the Indo-Europeans (relative to Gedrosia) and the claim that CHGs moved up and mixed with Steppe EHGs?
I'd hugely appreciate anybody explaining that to me, as I've never found a good answer, but maybe I haven't looked hard enough
I think Gedrosian was found on the pre-Maykop Steppe though, so perhaps that migration is a lot more ancient than is relevant in this context.
Or perhaps this Armenian was some fusion between Kura-Araxes and R1b women, who got their R1b admix from R1b men who went up to the Caucasus from Anatolia. That's my working theory at the moment, but the correlation between Y DNA L and Gedrosian (and the known correlation between R1b and Gedrosian in Europe) is striking.
Ancient Chalcolithic genomes from Anatolia and Iran (and Mesopotamia would be amazing) are desperately needed.
Whatever the case, it's very clear that these Y DNA Ls and R1bs are clearly related through Gedrosian admixture.