Published in Scientific Papers. Series D. Animal Science, Vol. LXVI, Issue 1
Written by Volodymyr LADYKA, Yuriy SKLIARENKO, Yuliia PAVLENKO, Svetlana KOVTUN, Tatiana DREVYTSKA, Victor DOSENKO, Viktoriy VECHORKA, Alona MALIKOVA
Genotyping of 114 stud bulls of local and specialized dairy breeds based on the beta-casein gene has been carried out. According to the results of the research, it is found that the highest frequency of the A2A2 desired homozygous genotype is characteristic of local cattle of Lebedyn breed and OBV (56%), as well as stud bulls of the Ukrainian White Headed breed (50). A significant difference in the frequency of genotypes for this trait has been established between individual breeds. The creation of micro-populations of cattle based on beta-casein with the A2A2 desired homozygous genotype makes it possible to obtain milk that has a number of properties, which are not characteristic of ordinary milk. Thus, the increased frequency of the A2A2 genotype for beta-casein may contribute to the conservation and spread of local breeds on Ukrainian farms.
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