Figure 2.

Principal Components Analysis of HGDP and Qatari samples

Principal components analysis plot of Qatar1, Qatar2, and Qatar3 (as defined by the STRUCTURE analysis in Figure 1) and population samples from the Human Genomic Diversity Project (HGDP). Qatar1 clusters well with other Middle Eastern samples. Qatar2 spreads away from the Middle Eastern cluster toward the Asian samples. Qatar3 spreads away from the Middle Eastern cluster toward the African samples. The interdigitation of the Qatar2 and Qatar3 samples could indicate recent admixture.