Results of a two-way ANCOVA model with Box–Cox-transformed relatedness increase of possible (Rsp) or Box–Cox-transformed arcsine square-root transformed proportion as the response variable and relatedness between clones as the covariate. (Day of experiment and whether clones were from the same or different soil samples were nominal effects. Neither relatedness between clones, day of experiment or whether clones were from the same soil samples were significant predictors of Box–Cox-transformed Rsp (whole model r2 = 0.12, n = 51) or Box–Cox-transformed arcsine square-root transformed proportion (whole model r2 = 0.14, n = 51).)