[Interdependence between milk productivity of cattle and a complex of loci of a coupled block of caseins and beta-lactoglobulin].

The complex lactoprotein markers, connected with the different level of milking capacity and fat percentage are found in cattle on the basis of experimental data. The high correlation is stated between selection of beta-lactoglobulin alleles and alleles of the coupled gene casein blocks on the levels of microevolution herds and macroevolution breeds.