Fig. 1

Genetic parameters (genetic correlations, r, of traits in the target with traits in the nucleus and challenge environments, and the ratio of the genetic standard deviation, SD, of traits in the target versus the challenge environment) as a function of the target environment, for A average daily gain, and B mortality rate. The x-axis represents the reaction norm covariate in the target environment, ranging from the nucleus environment (0) to the challenge environment (1)