The purpose of this research was finding the frequencies of the genetic variants of kappa-casein and beta-lactoglobulin and their connections between milk rennet coagulation properties of dairy breeds in Estonia. Milk samples (n=5189) were collected from 609 Estonian Holstein (EHF), and 321 Estonian Red cows. Most frequent genetic variant for kappa-Cn was AA (0.546) and for beta-Lg AB (0.443). All measured rennet coagulation parameters were significantly better for the kappa-casein BB. beta-Lg genetic variants had no significant effect on rennet coagulation parameters. Frequency of kappa-casein B allele has been considerably decreased in EHF cows. In earlier studies in Estonia have not been detected presence of unfavorable kappa-Cn E allele.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 01.65, 2006
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