Validation of resilience indicators by estimating genetic correlations among daughter groups and with yield responses to a heat wave and disturbances at herd level

Resilient cows are minimally affected in their functioning by disturbances, and if affected, they quickly recover. Previously, the variance autocorrelation of daily deviations from a lactation curve were proposed as resilience indicators. These traits heritable genetically associated with good health longevity. However, it was unknown selection for these indicators would lead to desired changes phenotype. The first aim this study investigate forward prediction another environment possible. Therefore, indicator records split into 2 subsets, each containing half daughters sire, within sire that calved early year-seasons more recent year-seasons. Genetic correlations between subsets then estimated indicator. second estimate genetic describing production responses actual disturbances. disturbances heat wave July 2015 yield at herd level. latter selected decreases mean all primiparous herd, indicating disturbance occurred. data set used calculation contained 62,932,794 milk on 199,104 cows. (rg) earlier daughter groups 1 both indicators, which suggests will result phenotype next generation. Furthermore, low correlated weak response (rg 0.47 0.97). Low reduced perturbation length quick recovery after (0.28 results suggest cover different aspects resilience, should be combined index. In conclusion, likely favorable themselves, confirms useful