Inferred admixture fractions [51] for different choices of number of clusters.

<p>Four different numbers of clusters are displayed. The fractions on the left show the fraction of 50 replicate analyses that support of the most common and displayed mode [<a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1006976#pgen.1006976.ref052" target="_blank">52</a>]. Populations that did not contribute to the African variation were removed from this figure. See <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1006976#pgen.1006976.s004" target="_blank">S3 Fig</a> for the full range of populations and additional K. The bars on top represent the ethnic group, the bars on the bottom indicate geographic grouping.