Principal Coordinates (PCo) plots.

<p>Analysis was performed on the 33 STR <i>loci</i> haplotypes (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144223#pone.0144223.s004" target="_blank">S1 Table</a>) screened here together with those previously typed by Battaglia et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144223#pone.0144223.ref043" target="_blank">43</a>]. On the whole, 46.13% of the total variance is represented: 25.62% by the first PCo and 20.51% by the second PCo. Plots are in relation to haplogroup affiliation (A), macrogeographic distribution (B), and Panamanian province distribution in the Central-South American context (C). In panel A, yellow squares are the Panamanian Y chromosomes predicted as belonging to haplogroup Q and not further sub-classified; dotted yellow squares indicate six samples (two of these are completely overlapping) characterized by the DYS391-6 allele. The tree on the right illustrates the phylogenetic relationships among haplogroups. Nomenclature is in agreement with Battaglia et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144223#pone.0144223.ref043" target="_blank">43</a>]. In panel B, Panamanian samples are represented by yellow symbols: squares are for predicted haplotypes and circles for haplotypes that were instead classified by SNP analysis [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144223#pone.0144223.ref043" target="_blank">43</a>]. South East America includes Argentina, Brazil, Paraguay and Uruguay; Central America includes Costa Rica, El Salvador, Guatemala and Nicaragua [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144223#pone.0144223.ref043" target="_blank">43</a>].