Fig. 1.

Allele-based estimates of ancestry in Europe and for European Jews, the Near East, North Africa, and Sub-Saharan Africa. Unsupervised ADMIXTURE results for k = 3–6. Cross-validation indicated k = 4 as the best fit, but higher density datasets (25) and higher values of k continue to identify population-specific ancestries (SI Appendix, Fig. S2); we therefore conservatively focused on k = 3:6 ancestral populations.