Fig. 1. Relationship between kernel no. plant^–1 and plant growth rate during a period bracketing silking for two hybrids (CG60 x CG102 and CG60 x MBS1236) and their three parental inbred lines (CG60, CG102, and MBS1236) exposed to water stress (W, 2003 and 2004) and plant density stress (PD, 2004). r² = 0.60, 0.46, and 0.53 for Model [1] fitted to CG60, CG60 x CG102, and CG60 x MBS1236, respectively; and r² = 0.51 and 0.43 for Model [2] fitted to CG102 and MBS1236, respectively. GDD = growing degree-day.