CONCLUSIONS
Genetic correlations between longevity traits expressed in organic and conventional dairy production in Sweden are generally close to unity. This indicates that no G×E of importance exists for longevity between the 2 systems, and development of specific breeding values for these traits for organic production is therefore not justified. However, the criteria for culling used by organic farmers tend to differ from those used by conventional farmers, which may express differences in farmers’ perspectives. This may in turn result in different weightings of traits in the breeding goal.