Using of DNA-testing of cattle for the LTF and MBL1 genes to increase the milk production efficiency

Abstract

In cows of the Belarusian black-motley breed, the polymorphism of genes for lactoferrin and mannose-binding leсtin was established. The genotypes LTFAA, LTFAB and MBL1TT, MBL1TC, MBL1CC were identified. The milk productivity (yield, fat content, amount of milk of basic fat content), the number of somatic cells in milk were studied, and the economic efficiency of milk production from cows with different genotypes for the genes of lactoferrin and mannose-binding leсtin was calculated. It was found that the profit in cows with the LTFAA genotype was 7.91 rubles higher than in cows with the LTFAB genotype, in individuals with the MBL1CC and MBL1TT genotypes, and a higher profit per head was obtained from cows with the LTFABMBL1CC and LTFAAMBL1TC genotypes, which amounted to 3249.49 and 2855.40 rubles respectively.