Plots of the clusters.

(a) Bar graph showing relative proportions of the three populations in clusters obtained from the hierarchical clustering tree (Figure S1). Clusters are ordered by their location in the tree. Several clusters are highly statistically enriched for one population (p<0.01 ^**) while some others are also moderately enriched (p<0.05^*). (b) Plot of power spectrum profiles of highly enriched (p<0.01) clusters 3, 11, 14 and 19 showing distinct patterns. Cluster 3 and 19 consist of predominantly African individuals, cluster 14 consists of European individuals and cluster 19, Asian individuals.