engleski

ASSOCIATION OF GHR GENE POLYMORPHISMS ON BEEF CARCASS QUALLITY

In last decades selection in cattle breeding use genomics and direct selection to reveal preferred variants of polymorphic genes to a significant extent. In competitive beef production an important factor is the optimization of growth dynamics, quality carcasses production and meat rich in flavor. The aim of this research was to determine the allele variants of the GHR gene in the population of fattening beef and their correlation with the growth characteristics, carcasses and meat quality. In the studied population, dominance of the allele A variant (0.588) of the GHR gene was determined. Correlation between GHR gene allele variants with growth characteristics, slaughter weight, hot and cold carcasses weight, and dressing percentage was not determined. Significant relation was observed between AA genotype of GHR gene with a higher fat content (p<0.01) and a lower content of muscle tissue (p<0.05). Also, significant correlation between A allele with the body fat coverage (p<0.05) was observed. The results suggests on potential of the GHR gene polymorphism in the immediate cattle selection assisted by genetic markers. Favouring the allele G of GHR gene, it is possible to reduce the proportion of fat tissue in young bulls and increase the proportion of muscles. It is desirable to continue monitoring allele variants effects of the GHR gene on phenotypic characteristics and interaction with other candidate genes.

polymorphism, GHR gene, carcass quality, beef quality

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