Fig. 2. Variation in wheat grain yield (g m^–2) (A), kernel weight (B), kernels spike^–1 (C), and spikes m^–2 (D) across years. Dark and open symbols correspond to large and small seed size classes, respectively. Year x seed size interaction was significant (P < 0.05) in all the variables with exception of grain yield. ***, Difference between seed size classes in a given year statistically significant at the 0.001 probability level.