Fig. 4: Admixture coefficients estimated by ADMIXTURE (K = 6).
From: Genetic history from the Middle Neolithic to present on the Mediterranean island of Sardinia
Each stacked bar represents one individual and color fractions depict the fraction of the given individual's ancestry coming from a given “cluster”. For K = 6 (depicted here), Sardinian individuals up until the Nuragic share similar admixture proportions as other western European Neolithic individuals. Present-day as well as most post-Nuragic ancient Sardinian individuals have elevated Steppe-like ancestry (blue), and an additional ancestry component prevalent in Near Eastern/Levant populations (orange). An ancient North-African component (green) appears at low fraction in many present-day Mediterranean populations, and somewhat stronger in samples from the Sardinian Punic site Villamar. ADMIXTURE results for all K = 2, … , 11 are depicted in the supplement (Supp. Fig. 19).
