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Polymorphism of Bovine Lymphocyte Antigen DRB3.2 Alleles in Iranian Native Sarabi Cows
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 Title & Authors
Polymorphism of Bovine Lymphocyte Antigen DRB3.2 Alleles in Iranian Native Sarabi Cows
Pashmi, M.; Ghorashi, S.A.; Salehi, A.R.; Moini, M.; Javanmard, A.; Qanbari, S.; Yadranji-Aghdam, S.;
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Sarabi cows (n = 136) from the Sarabi Breeding Station were genotyped at bovine lymphocyte antigen (BoLA)-DRB3.2 locus by a genotyping system that used the polymerase chain reaction and restriction fragment length polymorphism. Genomic DNA was extracted from whole blood samples. A two-step polymerase chain reaction was carried out in order to amplify a 284 base-pair fragment of target gene. Nested-PCR products were digested with three restriction endonuclease enzymes RsaI, BstYI and HaeIII. Digested fragments were analyzed by polyacrylamide gel electrophoresis. Twenty-six BoLA-DRB3.2 alleles were identified with frequencies ranging from 0.4 to 15.1%. Six new allele types observed in this study have not been reported previously. Identified alleles include: BoLA-DRB3., , , , , , , , , , , , , , , , , , , , , , , , and . Their frequencies were found to be 0.4, 0.4, 0.7, 11.4, 1.1, 1.8, 2.9, 2.2, 4.4, 9.6, 1.1, 13.6, 0.4, 0.4, 1.1, 0.7, 0.4, 6.2, 2.2, 3.7, 1.1, 7.7, 1.5, 15.1, 2.6 and 7.3% respectively. The six most frequent alleles (DRB3.2 , , , , and ) accounted for 64.7% of the alleles in the population of this herd. Numerous studies on this locus, covering different breeds, has revealed the existence of various alleles in this locus, and new investigations have introduced novel alleles. With respect to the high number of the observed alleles in this survey and the novelty of some alleles with no previous record of reporting, it is plausible to conclude that the BoLA-DRB3.2 locus is highly polymorphic in Iranian native Sarabi cows.
BoLA-DRB3.2;Polymerase Chain Reaction;Restriction Fragment Length Polymorphism;Iranian Native Sarabi Cows;
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