Relationship of Lep, TG5, and SCD1 genes with milk fat in cows

The aim of this work was molecular genetic testing of cattle for genetic markers of economically useful traits and the study of the association of leptin, thyroglobulin, and stearyl-coa-desaturase genes in cows with milk fat levels using DNA diagnostics. As a result of the analysis of the occurrence of complex genotypes LEP, TG5 and SCD1 among 104 cows, 21 complex genotypes were identified, the most common of which are combinations of genotypes LEPCTTG5CCSCD1CT, LEPCTTG5CTSCD1CT, LEPCCTG5CTSCD1CT. The frequency of their occurrence was 17.3, 17.3, 12 %, respectively. The highest productivity indicators for milk yield and fat belong to the LEPTTTG5CCSCD1TT genotype - 8972, kg and 4.42 %, respectively.