Fig. 3

Identification and classification of hybrids. a STRUCTURE results showing the proportion of the genome of every individual originating from each of the two inferred clusters; medium-dark grey is cluster 1 (S. viminalis) and light grey is cluster 2 (S. schwerinii). The bars between the two vertical black lines show the introgressed individuals with Q-values between 0.1 and 0.9. b NewHybrids classification for every individual with posterior probabilities for a given class; medium-dark grey is the S. viminalis class, light-grey is the S. schwerinii class, dark grey is the class with backcrosses to S. viminalis and medium-light grey is the class with backcrosses to S. schwerinii. The morphological classification of each individual sample is shown in the middle, colour coded as in Fig. 2 (S. viminalis: yellow, S. schwerinii: blue, S. dacyclados: orange, S. viminalis x S. schwerinii: green, S. viminalis x S. dacyclados: lime, Infomation missing: white)