Relationship between N2fixed and15N/Nt ratio in nodules (A), shoots (B) androots (C) of six common bean recombinant inbred lines inoculated with R. tropiciCIAT899 and grown under sufficient (white circle) versus deficient (gray circle) Psupply. The equations inserted in the graphs describe the regression function underP sufficiency (light gray text) and P deficiency (dark gray text), respectively. Dataare means and standard deviation of four replicates harvested at 15 and 42 DAT. *,*** Significant difference at P < 0.05 and P < 0.001.