Fig. 4

Estimates of heritability and genetic variance as a function of challenge load (CL) based on the linear and cubic spline reaction norm (RN) models for average daily gain (ADG, kg/day) in the challenge nursery and finisher. Dots indicate estimates from multi-variate analyses with phenotypes under low, intermediate, and high CL treated as different traits. Green vertical lines indicate the 95% highest density interval for the challenge load. Nursery ADG was analyzed based on CL derived from early finisher growth rate, while finisher ADG was based on CL derived from the clinical disease traits across the challenge nursery and finisher