Association of g.286G>T polymorphism in exon 3 of leptin gene (Rsel) with semen quality in Sanjabi sheep

A total of 96 semen samples were collected from Sanjabi breed sheep over two years and during autumn and spring seasons in order to investigate the leptin gene polymorphism and its relationship with the characteristics of sperm quality and testicular size. At the same time, the dimensions of length, width and scrotal circumference were measured and blood samples were taken from sheep jugular vein for extract DNA. PCR was performed using specific primers to amplify a 463bp fragment including exon 3 of leptin gene. After PCR and determining three GG, GT and TT genotypes in the studied samples, it was determined that leptin gene polymorphism had significant relation with individual motility (P