Use of genetic markers in steppe grey cows breeding.

. The study was conducted on Steppe Grey cows during their first lactation. The genetic markers were haemoglobin and transferring. The milk production was evaluated quantitative and qualitative. Milk quality was determined by laboratory analyses and blood samples were taken to determine animal genotype. The experimental data were used to calculate the amount of milk on full lactation and normal lactation. the amount of fat and protein. the percentage of far and protein. For haemoglobin. all cows were homozygous AA. For the transferrin marker. genotype TfA/TfE displayed the best performance for two of the three surveyed traits (milk fat percentage and milk fat amount