Maximum germination rates (GR, calculated by replicate as the inverse of median time to germination (1/t₅₀) using Equation 5) after stratification at 5°C under various water potentials.

GR was assessed for each herbicide-resistant (R) and –susceptible (S) E. oryzicola population after 0, 3, 4, 7, 10, 14, 17, 28, 35, 57 and 92 days of stratification and values are averages ±SE of the maximum GR for each replicate.

To meet ANOVA assumptions, a Box-Cox transformation (λ  =  −1.8) was applied.