FIGURE 4.

Visualization of population structure in the ex situ and reintroduced addax populations using two methods. (a) PCA using 1704 SNPs in the managed addax populations, showing PC1 and PC2 (percentage of variation explained shown in brackets). The Tunisian metapopulations are represented by different shapes, as shown in the legend. Inset shows the first 20 eigenvalues. (b) Admixture results using 1073 SNPs filtered to minimize linkage disequilibrium, showing, for each individual, the proportion of genetic membership to each ancestry cluster for the most informative number of clusters (K = 2 to K = 6). K = 5 was the best supported model.