Global ancestry analysis of South American populations.

<p>(a) Principal Components Analysis of admixed individuals and continental reference panels. Each individual is represented as a point colored by country, region, or continent of origin. (b) Map of sampled populations. Countries of origin for admixed South Americans are highlighted and colored as in (a). (c) ADMIXTURE plot of admixed individuals and continental reference panels. Each individual is represented as a thin vertical bar. The colors represent the proportion of ancestry assigned to each cluster for each individual. <i>K</i> = 4 and <i>K</i> = 13 models are shown above, <i>K</i> = 2 through <i>K</i> = 15 models are available in <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1005602#pgen.1005602.s004" target="_blank">S4</a> and <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1005602#pgen.1005602.s005" target="_blank">S5</a> Figs.