Figure 5.

PCA and StepPCO results for chromosome 1. Solid lines centered around 1 and -1 indicate the mean PC1 coordinate for each parental population; progressively lighter shading surrounding the mean of each parental group indicate +/-1, +/-2 or +/-3 standard deviations from the mean. (a) Upper panel: PC1 vs PC2 for populations of CEU, YRI and ASW. Lower panel: Unphased chromosome 1 of an individual of African American ancestry; European (blue) and Yoruba (red) populations are used as parental groups. (b) Upper panel: PC1 vs PC2 for populations of MEL, BOR and PLY. Lower panel: Unphased chromosome 1 of an individual from Polynesia; Borneo (green) and New Guinean (orange) populations are used as parental groups. (c) Upper panel: PC1 vs PC2 for populations of MEL, PLY and FIJ. Lower panel: Unphased chromosome 1 of an individual from Fiji; Polynesia (brown) and New Guinean (orange) populations are used as parental groups.