Figure 1.

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
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