Figure 2. Relative embryo weight (A and B) and relative embryo oil concentration (C and D) of kernels located at the middle of the ear as a function of post-flowering source/sink ratio quantified as plant leaf area duration per kernel (A and C) or plant weight gain per kernel (B and D). Symbols as in Fig. 1. Lines indicate the models fitted to the data. For A: Relative embryo weight = 0.70 + 0.23 source/sink ratio (r² = 0.49, n = 16, P < 0.01), for source/sink ratio < 1.32 m² °Cd k^–1, relative embryo weight = 1, for source/sink ratio 1.32 m² °Cd k^–1. For B: Relative embryo weight = 0.55 + 0.0017 source/sink ratio (r² = 0.62, n = 16, P < 0.001), for source/sink ratio < 247.7 mg k^–1, relative embryo weight = 0.97, for source/sink ratio 247 mg k^–1.