Hematological parameters of blood of the heifers of different lines of the Kazakh white-headed breed

Abstract

The experience of importing high-yielding foreign producers has shown the disadvantages of this practice due to low adaptation of the imported animals and difficulties in their full acclimatization to new conditions of housing and feeding. As a result, at best it prevents them from realizing their potential, at worst it contributes to their rapid drop out of the reproduction process. Domestic breeds are adapted to Russian conditions, but need to improve their productive qualities. Therefore, selection and breeding work is of key importance in the technological development of the beef cattle breeding industry of our country. We conducted studies on the heifers of the Kazakh white-headed breed of the Donguz 7139, Korol 13682NV-6 and Zolotoi 3423 lines in the conditions of the APC (collective farm) "Anikhovsky" of the Adamovsky district of the Orenburg region. Blood sampling of the heifers at 15 months of age (n = 18) was carried out in the morning before feeding from the jugular vein, for morphological studies – in vacuum tubes with an anticoagulant, for biochemical – with a coagulation activator. It was found that the heifers of the Zolotoi 3423 line surpassed the animals of the Donguz 7139 line in blood content of total protein (79,9 g/l) by 5.6%, albumins (36,8 g/l) by 6.35%, AST (27,8 Un/l) by 4.27%, ALT (105,0 Un/l) by 14.2%, erythrocytes (5,67 ∙ 10[1]2 cells/l) by 15.24% and hemoglobin (79,6 g/l) by 12.42%, that indicates a high rate of metabolism and redox processes in their body and eliminates the hidden risks of stability, adaptability of the gene pool of a new breeding form. Taking into account the productivity indicators given in the previous article, as well as the results obtained in the course of the present study, the creation and increase in the number of animals of the Zolotoi 3423 line is promising in breeding and breeding work with a herd of the Kazakh white-headed cattle in the APC (collective farm).