Fig. 1

The SwAsp natural variants display a wide range of phenotypic variation. a 65 traits related to tree growth, wood chemical composition, wood structure and anatomy, and saccharification traits of woody biomass in 10-year-old aspen trees from 113 genotypes. Each point represents the median scaled and centred measurement of a trait for one genotype (z-transformation across the tree population for each trait). Coloured labels around the plot indicate categories of traits (chemical composition; structure and anatomy; saccharification and growth). Abbreviations are defined in Additional file 1. b Principal component analysis (PCA) scatter plot showing that the SwAsp genotypes differ from each other based on their wood properties and saccharification. The broad-sense heritability for PC1 was 0.515 (95% confidence interval 0.404 to 0.623) and for PC2 0.189 (95% confidence interval 0.08 to 0.314). Colours indicate the 12 different locations of origin for the different genotypes in Sweden. c Coefficients scatter plot of traits. Each point corresponds to a trait; while the colours indicate which trait category they belong to (as in a)