Fig. 2. Genotypic response of flag leafA max (A, B) and plant grain yield (C,D) to elevated CO2 (Y axis) as predicted with local sink-source ratio (LSSR, X axis) measured either under ambient CO2 level (Fig. A, C) or elevated CO2(B, D). For genotypes refer to Table 1. The 95% confidence interval is provided for the correlations and SEM error bars are provided for each genotype. Exp. 2, greenhouse.