Relationship between blood biochemical parameters and beef quality indicators in Hereford bulls

Federal Research Centre of Biological Systems and Agrotechnologies RAS, Orenburg, Russia

^* Corresponding author: nick.gerasimov@rambler.ru

Abstract

The aim of this study was to investigate the relationship between blood serum biochemical composition and hormonal status of Hereford bulls and beef quality indicators. The object of the study was Hereford bulls (n=9) aged 20-21 months. AST activity was positively correlated with the amount of fat (r=0.70; P<0.05), whereas a similarly strong but inverse relationship (r=-0.87; P<0.05) was found with the moisture content in beef. A significant negative correlation (r=-0.71; P<0.05) was found between thyroxine content and linolenic fatty acid. The most significant correlation of palmitic (r=0.72; P<0.05) and oleic FA synthesis (r=-0.72; P<0.05) was observed with total protein content. Tyrosine, cholesterol and triglyceride levels were negatively correlated with amino acid composition. Moreover, the association of thyroxine with methionine (r=-0.76; P<0.05), triglycerides with arginine (r=-0.82; P<0.05), methionine (r=-0.68; P<0.05) and threonine (r=-0.69; P<0.05) reached significant values in terms of strength. These summary tests objectively describe the peculiarities of synthetic and metabolic processes in the bovine body. A complex approach to predicting the biological value of beef based on correlation with physiological and biochemical indices of blood in young Hereford cattle has been applied to increase the efficiency of selection and breeding work in beef cattle breeding.