GENOTYPING OF CATTLE BY ALLELIC VARIANTS A1 AND A2 OF THE BETA-CASEIN GENE: EMPLOYING DIFFERENT METHODOLOGICAL APPROACHES (AS-PCR AND ACRS-PCR)

Abstract

This article addresses the comparative analysis of the efficiency of cattle genotyping based on allelic variants A1 and A2 of the beta-casein gene, employing different methodological approaches. The primary methods employed include AS-PCR (AS-PCR 244 bp and AS-PCR 854 bp) and ACRS-PCR (ACRS-PCR DdeI and ACRS-PCR TaqI). Bioinformatics and laboratory diagnostics methods were used for a comparative analysis of genotyping efficiency. The study results unveiled the advantages and disadvantages of each methodological approach employed, it identified the specificity and accuracy of flanking the experimental fragment of the bovine beta-casein gene and underscored the necessity to optimize typing algorithms based on prevailing conditions when utilizing model objects. Based on the results of the research, an effective general typing algorithm was developed using the AS-PCR and ACRS-PCR methods. The allele-specific PCR method is proposed as the primary approach for routine genotyping of cattle, with ACRS-PCR suggested as a tool to verify results in cases of ambiguous findings and for blind typing of samples, among other applications.