STRUCTURE results after adding additional individuals to the YCC panel, based on 47 ASMs. Genotypes of the 47 ASMs ascertained by the 4gen pairwise FST approach from 22 individuals from Somalia, Afghanistan, and Sudan, were added to the genotypes of the original 74 YCC samples. After STRUCTURE analyses, the likelihood of the data was maximal at K = 4 ancestral populations (or clusters). Individuals are represented as vertical bars that are partitioned into segments corresponding to their membership of the clusters indicated by the four different colours. Each colour reflects the estimated relative contribution of one of the four clusters to that individual's genome and sum up to 100% (indicated at the Y-axis). Individuals were sorted according to their geographical origins (indicated below each group) after completion of the STRUCTURE analyses.