title: [Intra-population differentiation of Cholmogoric purebred cattle for the gene frequency of the kappa-casein locus].
abstract: Investigation of the sampling of 2907 cows from 17 farms of three regions of the Non-chernozem zone of the European part of Russia showed that kappa-caseine synthesis is controlled by two allelic genes--ae-CnA and ae-CnB. The average frequency of the ae-CnA was 0.689; of the ae-CnB--0.311; in factory herds--0.718 and 0.282, respectively; in reproductive herds--0.714 and 0.286, respectively; in market herds--0.629 and 0.371, respectively. The high frequency of ae-CnB allele (0.331) has been revealed in subpopulation of cholmogoric cattle of the Komi Republic. In the herds of cholmogoric cattle of the flood-plains of Pechora river ae-CnB frequency reached 0.520 and 0.575. The assumption is made about selective role of polymorphism and necessity of rational use of gene pool of domestic cattle.
authors.forename: V S
authors.initials: VS
authors.lastname: Matiukov
mesh_terms: D000483:Alleles; D000818:Animals; D002364:Caseins / Q000235:genetics*; D002417:Cattle / Q000235:genetics*; D005787:Gene Frequency; D005828:Genetics, Population
chemical_list: D002364:Caseins