Fig. 2. Coefficient of determination (r²) corresponding to linear regressions calculated from (a) weight per seed (W_s) and intercepted photosynthetically active radiation (PAR), and (b) oil concentration (O) and intercepted PAR, for different periods of 100°C d during seed filling for Exp. SDT1 and SDT2 (0°C d corresponded to flowering, base temperature = 6°C). Tick labels on horizontal axes of figures correspond to the beginning points of the 100°C d periods. Horizontal lines indicate r² values corresponding to P 0.01 (r² 0.37 and 0.29 for SDT1 and SDT2, respectively).