Admixture proportions for K = 3 genetic groups obtained from genetic structure analysis of nuclear data of Mediterranean  Dioscorea communis samples through ten replicates in STRUCTURE (see text for details). Each sample is shown by a vertical bar partitioned according to its membership to one of the K clusters, represented in red, green and blue. The samples follow the same order as in the nuclear phylogenetic tree (Figure 1) and organized by clades (DC2 and DC3). The plastid clades (I, II and III, Figure 1) were labelled next to the sample codes. An asterisk (*) was used to represent the only sample of D. communis (R32) that was resolved as part of clade DC1 based on nuclear data, and in a different clade with plastid data (see Figure 1).