Influence of polymorphism of the kappa-casein gene of cows on the development of calves in the early postnatal period

The authors found that the density of colostrum in cows with a homozygous genotype for B allele kappa-casein gene was higher compared to A and had greater amount immunoglobulins by 29.5 mg/l, respectively. formation high colostral immunity calves obtained from mothers genotypes AB BB prevented occurrence diseases gastrointestinal tract, AA reduced colostrum, it led development diarrhea 12% newborn calves. dynamics live weight gene, during first 30 days life, 6.34 4.78 kg lower than young gene. At age one month, leukocyte content less 10.8 16.2%, hemoglobin 10.5 10.7%.