[The polymorphism of the kappa-casein gene and its connection to economically valuable traits in cattle].

The literature data on milk protein (particularly kappa-casein) polymorphism study in different cattle breeds are represented. Allele variants of kappa-kasein are associated with lactation and have an influence on the composition of milk and its properties, including cheese-making properties. The importance of ways of kappa-casein genetic variants use in concrete selection programs are discussed.