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ancient human genomes suggest three ancestral populations for present-day europeans | nature

We sequenced the genomes of a ~7,000 year old farmer from Germany and eight ~8,000 year old hunter-gatherers from Luxembourg and Sweden. We analyzed these and other ancient genomes1–4 with 2,345 contemporary humans to show that most present Europeans derive from at least three highly differentiated populations: West European Hunter-Gatherers (WHG), who contributed ancestry to all Europeans but not to Near Easterners; Ancient North Eurasians (ANE) related to Upper Paleolithic Siberians3, who contributed to both Europeans and Near Easterners; and Early European Farmers (EEF), who were mainly of Near Eastern origin but also harbored WHG-related ancestry. We model these populations’ deep relationships and show that EEF had ~44% ancestry from a “Basal Eurasian” population that split prior to the diversification of other non-African lineages. Near Eastern migrants played a major role in the introduction of agriculture to Europe, as ancient DNA indicates that early European farmers were distinct from European hunter-gatherers4,5 and close to present-day Near Easterners4,6. However, modelling present-day Europeans as a mixture of these two ancestral populations4 does not account for the fact that they are also admixed with a population related to Native Americans7,8. To clarify the prehistory of Europe, we sequenced nine ancient genomes (Fig. 1A; Extended Data Fig. 1): “Stuttgart” (19-fold coverage), a ~7,000 year old skeleton found in Germany in the context of artifacts from the first widespread farming culture of central Europe, the Linearbandkeramik; “Loschbour” (22-fold), an ~8,000 year old skeleton from the Loschbour rock shelter in Luxembourg, discovered in the context of hunter-gatherer artifacts (SI1; SI2); and seven ~8,000 year old samples (0.01–2.4-fold) from a hunter-gatherer burial in Motala, Sweden (the highest coverage individual was “Motala12”). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4170574

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