GENETIC CHARACTERISTICS OF THE URITSKIY SPK HERD FOR MARKER GENES OF BLOOD GROUPS

Abstract

According to the results of the study, it was found that in the herd of the Agricultural Production Cooperative named Uritsky allele G₂Y₂E^/₁Q occurs with the highest frequency (0.216 – 0.282). It was noted that the frequency of occurrence of alleles of the EAB locus of blood groups: b, B₂O₁Y₂, E^/ ₃G^/G^//, G₂Y₂D^/, I₁Y₂E^/ ₃G^/G^//, I₁O₂A^/₂K^/Q^/, O₁I^/Q^/, O₂A^/ ₂J^/ ₂K^/O^/, Q^/, Y₁A^/₁  equals  in different years in animals 0.018 – 0.095. The total frequency of occurrence in the herd of the above alleles in 2016 was 0.517, in 2020 0.485. in first-born heifers and repair heifers, these eleven alleles occurred with a frequency of 0.468, 0.408, respectively. These most common EAB alleles in animals of different production groups are like a genetic passport of the herd, characterizing its genetic stability. It was revealed that lifetime productivity and duration of use depend on inherited of the alleles EAB- locus of blood groups. In the cows with EAB alleles B₁G₂KO^/, I₁O₂A^/₂K^/Q^/, O₂A^/₂J^/₂K^/O^/, O₁Y₂E^/₃G^/G^//, I₁Y₂E^/₃G^/G^//, I₁Y₂I^/, O₁I^/Q^/, Q^/, lifetime productivity is reliably higher than the average for the herd. The Cows with alleles of the EAB locus of blood groups B₂O₁, B₁I₁T₁A^/₁, G₃O₁T₁A^/₂E^/₃F^/₂K^/G^//₂, O^/, B₂O₁Y₂, B₂Y₂E^/₃G^/G^//, G₂Y₁D have milk yield during the period of use reliably lower than the average for the group. The Lifetime Productivity of thirty tons and above was noted in more than 40% of cows of the herd with the EAB alleles B₁G₂KO^/, I₁O₂A^/₂K^/Q^/, O₁, O₁Y₂E^/₃G^/G^//, O₂A^/₂J^/₂K^/O^/, Q^/.  The EAB alleles of the locus of blood groups I₁Y₂E^/₃G^/G^//, I₁Y₂I^/, I₁O₂A^/₂K^/Q^/, A^/₁B^/ it found only in cows that have completed six or more lactation.