Two caves in western Georgia — Satsurblia and Kotias Klde — produced genomes that changed how all of West Eurasian ancestry is modelled. For most nations, ancient DNA tells a story of arrivals; for Georgians, it mostly tells a story of staying. That makes Georgian ancestry one of the cleanest continuity cases in the entire literature, and worth telling carefully.
The short answer: Georgians derive the bulk of their ancestry from the Caucasus hunter-gatherer (CHG) lineage documented in Georgia itself 13,000–10,000 years ago, blended with Anatolian farmer-related ancestry that arrived with the Neolithic, and comparatively little after that. The highlands especially preserve one of the highest retentions of local Palaeolithic-era ancestry anywhere in Eurasia.
The genomes that named a lineage#
Jones et al. 2015 sequenced a Late Upper Palaeolithic man from Satsurblia cave (~13,300 years old) and a Mesolithic man from Kotias Klde (~9,700 years old). They formed their own deep branch of West Eurasian ancestry — split from western European hunter-gatherers tens of millennia earlier — and the paper named it: Caucasus hunter-gatherers, CHG. The label you now see in every admixture calculator and half the qpAdm source lists in the literature is, concretely, these Georgian individuals and their relatives.
CHG turned out to be load-bearing far beyond the Caucasus: roughly half the ancestry of the Yamnaya steppe pastoralists — and through them a substantial share of all Europe — plus a major stream into Iranian-plateau and South Asian ancestry. Genetically, the Caucasus was not a periphery; it was a wellspring.
Farmers arrive, the blend sets#
Through the Neolithic and Chalcolithic, Anatolian farmer-related ancestry spread into the South Caucasus and mixed with the local CHG base. By the Early Bronze Age, the Kura-Araxes horizon (~3500–2500 BCE) — sampled at sites in Georgia, Armenia and beyond — shows the settled result: a stable CHG-plus-Anatolian blend with minor Iranian-plateau-related contributions, remarkably uniform across the region (Wang et al. 2019; Lazaridis et al. 2022). That Bronze Age profile is, to a first approximation, still the Georgian profile: subsequent millennia — Colchis and Iberia of the classical sources, Roman and Persian spheres, medieval kingdoms — reshuffled elites and borders while the ancestry of the valleys barely moved.
Wang et al. 2019's wider finding frames why: the Greater Caucasus ridge acted as a genetic boundary, not a corridor — steppe ancestry pooled to its north while the south kept the CHG–Anatolian blend. The mountain wall that preserved Georgian's unique language family shows up in allele frequencies too.
What modern Georgian genomes show#
Modern samples — Georgians in worldwide reference panels, regional studies of the Caucasus — repeat three findings. High continuity: Georgians consistently model with among the highest CHG-related shares of any modern population, highest in highland groups (Svans, mountain easterners), grading gently toward more Anatolian-related weight in the west. Tight regional clustering: Georgians sit with Abkhazians, Circassians and other South Caucasus neighbours, nearer Armenians than to either the steppe or Iran — geography over politics, as usual. Old uniparentals: Y-DNA is dominated by G2a (a lineage tied to the Neolithic and Caucasus since antiquity) and J2, with the highland valleys carrying founder-effect spikes — one valley, one dominant surname-lineage — that make haplogroup readings especially local here.
The gaps worth naming: sampled ancient genomes from Georgia cluster in the west and the prehistoric periods; the classical-to-medieval transect (Colchian, Iberian, Bagratid-era genomes) is thin, so continuity through those centuries is inferred from the endpoints rather than watched happen — the same honest caveat every continuity story owes its readers.
Reading your own results#
- G25 distances: modern era led by Georgian and neighbouring Caucasus averages; ancient eras led by Kura-Araxes-related and CHG-related samples — one of the few ancestries where the deepest era's leaders are from your own territory.
- Admixture fits: expect CHG-related plus Anatolian-related to carry the model. CHG-vs-Iranian-Neolithic is the classic collinear pair here — the two are close relatives, and panels that offer both will split them unstably.
- qpAdm: Georgian genomes are rewarding formal targets precisely because the deep sources are locally anchored — and the right set has to work hard to separate CHG from its Iranian-related sister stream. A model record that says the data cannot fully distinguish them is reporting honestly.
Frequently asked questions#
Are Georgians "descended from the Caucasus hunter-gatherers"?#
In substantial part, yes — that is the rare case where the slogan matches the models. With the standard caveat: blended with Anatolian farmer-related ancestry since the Neolithic, so no living person is a CHG.
How much steppe ancestry do Georgians have?#
Little — the ridge kept most of it north. Small steppe-related percentages in hobby calculators are usually reference-panel artefacts or the CHG kinship showing through, since steppe ancestry is itself half CHG-related.
Is Georgian ancestry the same as Armenian?#
Close neighbours built from the same deep streams in different ratios — Armenians carry more Anatolian-related weight and a documented Bronze Age steppe pulse that Georgians largely lack. Distinguishable, and mutually each other's nearest comparisons.
Terms used here are defined in the glossary.
Sources and further reading#
- Jones, E. R. et al. (2015). Upper Palaeolithic genomes reveal deep roots of modern Eurasians. Nature Communications, 6, 8912.
- Wang, C.-C. et al. (2019). Ancient human genome-wide data from a 3000-year interval in the Caucasus corresponds with eco-geographic regions. Nature Communications, 10, 590.
- Lazaridis, I. et al. (2022). The genetic history of the Southern Arc. Science, 377, eabm4247.
- Yardumian, A. et al. (2017). Genetic diversity in Svaneti and its implications for the human settlement of the Highland Caucasus. American Journal of Physical Anthropology, 164, 837–852.
