Principal component analysis (PCA) of ten West-African population samples and the HapMap YRI sample based on the Y-SNP frequencies using the phylogeny given in S2 Fig.

<p>The cumulative proportion of the plot is 0.90 for the first two principal components (PC1: 0.63; PC2: 0.27). In this analysis the Ghanaian C1 population sample was excluded from the analysis. The nomenclature and the references of the population samples are available in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141510#pone.0141510.s012" target="_blank">S1 Table</a>.