a Analysis performed with STRUCTURE 2.3 software using an admixture model with correlated allele frequencies. The clustering profile obtained for K = 6 (b) is displayed and is indicated by different colors. Each of the 34 genotypes is represented by a single column broken into colored segments with lengths proportional to each of the K inferred gene pools. The left-hand scale indicates the membership coefficients (Q) for allocating genotypes into clusters. Genotypes are named according to the annotated numbers listed in Table 3; four major Clusters of individuals were identified, and Clusters are indicated by numbers I-VI. b ΔK values for each K value, calculated according to Evanno et al. . The highest ΔK value corresponds to the optimal K.