Fig. 3From: Hybridization and introgression in sympatric and allopatric populations of four oak speciesMolecular and phenotypic cluster analysis of 10 oak populations. a NJ cluster analysis implemented in MEGA 7.0 (Sudhir et al. 2016) based on the Nei’s unbiased genetic distances (Nei 1978). b Cluster analysis based on phenotypic traits variationBack to article page