Fig. 4

Genetic gain in average daily gain (ΔADG) and mortality (ΔMORT) in the nucleus (green) and target (blue) environments and for the breeding goal (ΔH) in the target environment, as a function of the recording environment. The objective was to maximize the breeding goal in the target environment and the x-axis represents the reaction norm covariate in the recording environment, ranging from the nucleus environment (0) to beyond the original challenge environment (1), with the target environment at 0.5 (vertical broken line). Phenotypes are recorded only in the nucleus and in the recording environment. Genetic gain in the breeding goal for the target environment (ΔH) is expressed as a % above that obtained when the recording environment is the nucleus