Fig. 2. Relationship between standard germination or accelerated-aging germination and mean daily maximum temperature during soybean seed filling (growth stage R5–R7) for Hutcheson. Growth stage R8 was used for the end of seed filling in Kentucky and Mississippi in 2001. All seed lots were included (n = 20), and the regression analysis for standard germination was not significant (P = 0.05), but the model for accelerated-aging germination (Y = –98.966 + 17.682X – 0.401X2) was significant (P = 0.01).