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[Genetically conditioned variability of metabolic profile parameters in dairy cows].

Individual heritability and differences in the concentration of the chemical components of the blood were studied in the dairy cows of the Slovak Spotted breed. The experiment was performed with 166 cows. The set comprised six groups of half-sisters from three stocks. The differences among the cows were statistically significant (alpha = 0.01) in the majority of the parameters studied: haematocrit, haemoglobin, pH, PO2, oxygen saturation of the blood; plasma potassium, phosphorus, magnesium, calcium, total protein, urea, glucose, alkaline phosphatase, and esterified fatty acids. The coefficients of repeatibility for the mentioned parameters ranged from 0.19 to 0.75. The heritability coefficients were calculated for the parameters in which the inter-group differences were significant: total protein (0.62), magnesium (0.57), potassium (0.51), urea (0.49), glucose (0.45), phosphorus (0.43), calcium (0.39), haematocrit (0.37), haemoglobin (0.35), pO2 (0.29). The results suggest that some of the parameters under study are under certain genetic control.