Fig. 6. Relationship between accelerated-aging germination and mean daily maximum temperature during the last 14 d of seed filling (growth stage R7 – 14d) for those seed lots with no evidence of seed infection by Phomopsis longicolla in the standard germination test. The regression analysis for DP4690 (Y = 144.440 – 2.162X, P = 0.05) was not significant, but the model for Hutcheson (Y = –185.875 + 23.937X – 0.508X²) was significant at P = 0.01.