Abstract
The ?-lactoglobulin (BLG) gene, which is responsible for the biological value indicator that affects the ratio of protein fractions, the level composition and technological characteristics of milk presents of considerable interest for dairy cattle breeding. The purpose of our work was to identify the relationship with the polymorphism of the beta-lactoglobulin gene and the biochemical blood parameters and dairy productivity of Holstein cattle. This research was carried out in 2020-2021 on 148 Holstein cows in the Integrated Agricultural Production Centre “Stud farm named after Lenin” of Atninsky district of the Republic of Tatarstan. As an effect of the studies, it was shown that the animal herd is polymorphic in the ?-lactoglobulin gene. Population is represented by three genotypes: AA - 24.3, AB - 47.3 and BB - 28.4%. The frequency of occurrence of alleles A and B was 0.480 and 0.520, respectively. In group of animals with AB genotype of BLG gene in the blood serum was detected an increased content of indicators of protein metabolism (total protein, albumin, ALT) and the minimum level of urea. Cows whit BLG AB genotypes are characterized by an increased mass fraction fat and protein, MSNF (milk solids non-fat) and dry matter. This research was supported by FASO Russia project number: 122011800138-7.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
