Species- and genotype-specific variation in the spatial density function. (a) Log-log plot of the volume versus mass for all 1645 architectures. Green dots correspond to the tomato WT/Moneymaker architectures, and black transparent dots correspond to all other architectures. (b) Histogram of the distances to the regression line in panel (a) for all tomato WT/Moneymaker architectures; 100.0% of the architectures lie below the regression line. (c, d) Similar plots for four genotypes of corn. (e, f) Similar plots for two recombinant inbred lines of rice (families 182 and 16). Overall, some of the scatter around the regression lines relates to differences in genotype and species.