Fig. 1 Partial regression plots showing the effect of each factor on transformed FST values after accounting for the effect of other independent variables in model 7 (i.e., adjusted FST). Parallel boxplots of the partial residuals are drawn for the levels of each factor along with significant differences between groups depicted by the upper horizontal grey lines according to model 7 (Table 2): (a) mating system, (b) growth form,(c) pollination mode, (d) seed dispersal mode, and(e) latitudinal region. Thick horizontal black lines are median values, boxes indicate 25% and 75% quartiles, whiskers are maximum and minimum values, white circles are outliers. (f) Relative importance of each factor (ΔR2 value); the change in R2 after each individual factor is removed from model 7.