Polymorphism Study of POU1F1 Gene in Mandya and NARI-Suwarna Sheep

Background: The mutations in POU1F1 gene result in deficiency of GH, PRL and TSH-â expression and thus have an indirect effect on development and reproduction. The present study was conducted to determine and compare the polymorphism of POU1F1 gene in Mandya and NARI-Suwarna Sheep. Methods: Blood samples were collected from 50 each of Mandya and NARI-Suwarna sheep and genomic DNA was isolated following Miller’s high salt method. PCR-RFLP analysis was performed for exon 3 and exon 4 regions of POU1F1 gene, whereas, PCR-SSCP analysis was performed for exon 6 region of POU1F1 gene. Result: The PCR products of sizes 365 bp, 508 bp and 501 bp for exon 3, exon 4 and exon 6 regions of POU1F1 gene, respectively were successfully amplified. PCR-RFLP analysis of exon 3 and exon 4 regions of POU1F1 gene with AluI and EcoRI restriction enzymes, respectively revealed monomorphism in both Mandya and NARI-Suwarna sheep. The PCR-SSCP analysis of exon 6 region of POU1F1 gene revealed two patterns, P1 and P2 with frequencies of 98 and 2 per cent, respectively in Mandya sheep and 90 and 10 per cent, respectively in NARI-Suwarna sheep. The alignment of P1 and P2 pattern sequences revealed two SNPs (109 G greater than C and 112 T greater than A) in Mandya sheep, whereas 3 SNPs (218 T greater than G, 225 G greater than A and 264 T greater than A) were revealed in NARI-Suwarna sheep. Polymorphism was successfully established at exon 6 region of POU1F1 gene.