DOI: 10.36871/vet.zoo.bio.202103011
UDC 637.07

Authors

N. S. Marzanov
Doctor of Biological Sciences, Professor, Chief Scientific Officer Cattle Genetics and Genomics Laboratory, Ernst Federal Research for Animal Husbandry Podolsk-Dubrovitsy, Russian Federation
D. A. Devrishov
Doctor of Biological Sciences, Corresponding Member of the Russian Academy of Sciences, Professor of the Department of Immunology and Biotechnology, Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin, Moscow, Russian Federation
S. N. Marzanova
Candidate of Biological Sciences, Associate Professor of the Department of Immunology and Biotechnology, Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin, Moscow, Russian Federation
О. О. Getokov
Doctor of Biological Sciences, Professor of the Department of Animal Science and Veterinary and Sanitary Expertise, Kabardino-Balkarian State Agrarian University named after V.M. Kokov, Nalchik, Russian Federation
D. A. Abylkasymov
Doctor of Agricultural Sciences, Professor, Professor of Department of Animal Biology and Zootechny, Tver State Agricultural Academy, Tver-Sakharovo, Russian Federation
I. S. Libet
Postgraduate of Department of Animal Biology and Zootechny, Tver State Agricultural Academy, Tver-Sakharovo, Russian Federation

Abstract

The allelotypes of the analyzed populations of Black-and-White cows bred in the Tver Region and the Republic of Ingushetia have been reported. The strong effects of breed and trends for its production parameters in the analyzed Black-and-White cows bred in the Tver Region and the Republic of Ingushetia, rather than the ecological impact, are revealed. The frequency of the «bad» A1 allele at a beta-casein locus was higher in the animals in the Tver Region, comprising 0,56, while the “normal” A2 allele was reported at a frequency of 0,44. Quite similar results were obtained for the analyzed cows in the Republic of Ingushetia. Thus, the frequencis of the «bad» A1 allele and the normal allele comprised 0,52 and 0,48, respectively. The findings based on the survey results can indicate that the selective breeding activity in the Tver Region herd requires a shift towards increasing the occurrence of the favourable A2 alleles due to selecting the bull sires with the target genetic traits.

Keywords

cattle, Black-and-White breed, locus, beta-casein, allele, genotype, RT-PCR.