Crop Science -- Richards et al. 42 (1): 111 Figure IG5

Fig. 5. Grain yield advantage of near-isogenic Hartog lines selected for low carbon isotope discrimination ( ${Delta}$ ) compared with lines selected for high ${Delta}$ evaluated across nine environments differing in seasonal rainfall. Grain yield advantage (%) was estimated as: [( ${zeta}$ _{Low group} - ${zeta}$ _{High group})/ ${zeta}$ _{High group}] x 100. Yield varied from around 1.5 Mg ha^-1 with 250 mm rainfall to 5 Mg ha^-1 with 450 mm rainfall.