Dynamics of resistance factors in pigs of different genotypes in poststate ontogenesis

The paper presents data on age-related characteristics of the formation and formation of resistance factors in purebred and cross-breed pigs bred in the Middle Volga region. It has been established that cross-breeding pigs obtained from two pedigree sows (crossbreeding of pure-bred pigs of large white breed with large white breed of Estonian type) seeded by boars of Duroc breed have high rates of natural resistance factors.