The genetic prehistory of the Greater Caucasus
Anatoly R. Kantorovich,
Vladimir E. Maslov,
Vladimira G. Petrenko,
Vladimir R. Erlikh,
Biaslan Ch. Atabiev,
Rabadan G. Magomedov,
Philipp L. Kohl,
Kurt W. Alt,
Sandra L. Pichler,
Alexey D. Rezepkin,
Yakov B. Berezin,
Andrej B. Belinskiy,
Posted 16 May 2018
bioRxiv DOI: 10.1101/322347 (published DOI: 10.1038/s41467-018-08220-8)
Posted 16 May 2018
Archaeogenetic studies have described the formation of Eurasian 'steppe ancestry' as a mixture of Eastern and Caucasus hunter-gatherers. However, it remains unclear when and where this ancestry arose and whether it was related to a horizon of cultural innovations in the 4th millennium BCE that subsequently facilitated the advance of pastoral societies likely linked to the dispersal of Indo-European languages. To address this, we generated genome-wide SNP data from 45 prehistoric individuals along a 3000-year temporal transect in the North Caucasus. We observe a genetic separation between the groups of the Caucasus and those of the adjacent steppe. The Caucasus groups are genetically similar to contemporaneous populations south of it, suggesting that - unlike today - the Caucasus acted as a bridge rather than an insurmountable barrier to human movement. The steppe groups from Yamnaya and subsequent pastoralist cultures show evidence for previously undetected Anatolian farmer-related ancestry from different contact zones, while Steppe Maykop individuals harbour additional Upper Palaeolithic Siberian and Native American related ancestry.
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