Fig. 3

Components of the total variance in wood density traits (trial 1, 18 years after grafting) (*, **, *** = significant at p = 0.05, 0.01 and 0.001 levels)
Components of the total variance in wood density traits (trial 1, 18 years after grafting) (*, **, *** = significant at p = 0.05, 0.01 and 0.001 levels)