Fig. 2

Genetic gain in A average daily gain (ADG) and B mortality in the nucleus (green), challenge (red), and target (blue) environments when the objective is to maximize the breeding goal in the target environment, without (solid lines) and with (broken lines) recording phenotypes in the challenge environment. The x-axis represents the reaction norm covariate in the target environment, ranging from the nucleus environment (0) to the challenge environment (1)