Akademik Veri Yönetim Sistemi
Journal of the Hellenic Veterinary Medical Society, cilt.73, sa.4, ss.4853-4860, 2022 (SCI-Expanded)
This study’s objective was to investigate the genotypic structures of the Pit-1 gene from genomic DNA samples taken from the Simmental and Brown Swissbreeds and determine the distribution of genotype and allele frequencies of bovine breeds and reveal the relationships between the detected genotypes and some performance traits. Pit-1/HinfI gene polymorphisms were determined using the PCR-RFLP method from genomic DNA samples obtained from Brown Swiss and Simmental cattle used in the study. According to the Hardy-Weinberg genetic test, the distribution of genotype frequencies of the studied population was found to be in equilibrium (p˃0.05) in both breeds. Genotype frequencies of AA, AB, and BB alleles of the Pit-1 gene were determined as 5.73%, 36.42%, and 57.85%, respectively, forthe Simmental breed, while the genotype frequencies for the Brown Swiss breed were determined as 9.43%, 42.86%, and 48.01%, respectively. Concerning the Simmental breed, the actual milk yield was determined as 5953 ± 364.2, 5212 ± 993.4, 5507 ± 889.5 kg, the 305-day milk yield as 5953 ± 276.8, 5642 ± 782.7, 5427 ± 246.7 kg, the lactation period as 307 ± 47, 293 ± 29, 303 ± 22 days, the daily milk yield as 19.53 ± 6, 18.49 ± 8, 17.81 ± 2 kg for AA, AB, and BB genotypes, respectively. Concerning the Brown Swiss breed, the actual milk yield was determined as 3606 ± 253, 3558 ± 530, 3999 ± 099 kg, the 305-day milk yield as 4920 ± 217, 4462 ± 900, 4635 ± 870 kg, the lactation period as 222 ± 36, 240 ± 04, 258 ± 37 days, the daily milk yield as 17.62 ± 2, 15.49 ± 2, 16.04 ± 3 kg for AA, AB, and BB genotypes, respectively.In the statistical analysis, the relationships between the performance traits studied and Pit-1 genotypes in Simmental and Brown Swiss cattle were not proven to be statistically significant