| 摘要 |
FIELD: zootechny, veterinary science. ^ SUBSTANCE: it is necessary to establish the genotypes of cows and breeding bulls in breeding stock according to BoLA DRB3 gene. Animals should be divided into groups by different sensitivity to persistent lymphocytosis: with genotype including two alleles referring to sensitivity (S/S); with genotype including two alleles referring to resistance (R/R), with genotype including one allele referring to sensitivity and another one - to resistance (S/R), with genotype including two neutral alleles (N/N), with genotype including one allele referring to sensitivity and another being neutral (S/N), with genotype including one allele referring to resistance and another being neutral (R/N). For reproduction it is necessary to match parental couples as follows: one parent with genotype R/R, another - S/S; or one parent with genotype S/R, and another S/S; or one parent with genotype N/R, and another - S/R; or one parent with genotype N/S, and another R/R. The innovation enables to increase resistance to persistent lymphocytosis in cattle along with the increase of cattle performance. ^ EFFECT: higher efficiency. ^ 6 tbl |
