title: Analysis of the reasons for culling Holstein cows depending on genetic factors
abstract: Relevance . When breeding dairy cattle of the Holstein breed, animal husbandry practices, along with the positive qualities of animals, face problems with reducing the reproductive function of cows and shortening the duration of the productive period. The purpose of the work is to analyze the reasons for culling dairy cows after the first lactation, depending on genetic factors (kappa casein genotype, lineage and breeding bull). Methods . The research was conducted in the conditions of a typical
journal: Agrarian science