3.3 | Genetic structure and Admixture Levels
Based on the maximum value of ΔK (Evanno et al., 2005) the estimated number of optimal groups was K = 3 (Figure S1, Table S1, Figure 4). Individuals from Cocalán, Culimo, Candelaria and Petorca populations had very close genetic characteristics, while Viña del Mar/Valparaíso was characterized as a unique group for almost all K values. The Culimo and Petorca individuals remain together for all the assigned K values (Figure 4). At K = 3, 99% of the individuals in each population are correctly assigned to the area from which they were sampled, and only one individual from OCOA (129) contains attributions higher than 50% from other areas of origin (Figure S2).