Fig. 2

Population composition from analyses of nuclear SNP genotypes, chloroplast haplotypes and morphological characters. For each population there are three bars. The leftmost depict results from the cluster analysis with the STRUCTURE software on the nuclear SNP markers and show for every population the number of individuals assigned to cluster 1 (blue) and cluster 2 (yellow). The number of individuals with Q-values between 0.1 and 0.9 are shown in red. The middle bars demonstrate the results from the classification based in morphological characters and shows for every population the frequency of individuals classified as S. viminalis (yellow), S. schwerinii (blue), S. dasyclados (orange), S. viminalis × S. schwerinii hybrids (green), S. viminalis × S. dasyclados hybrids (lime) and S. schwerinii × S. dasyclados hybrids (purple). The rightmost bars demonstrate the occurrence of chloroplast haplotypes in every population. Note that Kunerma and Slyudyanka have only two bars, as no chloroplast haplotype data was available. The map was created using ArcGIS® software by Esri. ArcGIS® and ArcMap™ are the intellectual property of Esri and are used herein under license