Clustering analysis of AFLP data for a pure Orchis militaris population, pure O. purpurea population and a hybrid population. (a) Principal coordinate (PCO) plot based on individual genetic distance calculated with 113 AFLP markers. The first two axes explain 63.6% and 17.7% of the variation, respectively. (b) Clustering analysis using STRUCTURE. Individuals are represented by columns, with colours representing the proportion of their genome assigned to the K = 2 inferred clusters in the model-based admixture analysis.
Jacquemyn et al. BMC Evolutionary Biology 2012 12:178 doi:10.1186/1471-2148-12-178