Fig. 1: The global admixture pattern of ancestry proportions using ADMIXTURE analysis in the UK Biobank African populations.

a Estimates of global ancestry of the UK Biobank African populations using unsupervised ADMIXTURE analysis (K = 3), PC 1-3, principal component 1-3; b The plot of Cross-validation (CV) error in the unsupervised ADMIXTURE analysis from K = 1 to 8; c Estimates of global ancestry of the UK Biobank African populations using supervised ADMIXTURE analysis on 3 ancestral reference populations (YRI, Yoruba in Ibadan from Nigeria; LWK, Luhya in Webuye, Kenya; CEU, Utah residents with Northern and Western European ancestry); d the density distribution plot of three ancestry proportions in the supervised ADMIXTURE analysis on 3 ancestral reference populations (YRI, LWK and CEU).