Periódicos Brasileiros em Medicina Veterinária e Zootecnia

Enhancement of extender excellence of frozen bull semen using alfa-tocopherol as an antioxidant

Ullah, ZakirKhan, HamayunHussain, Syeda MaryamTunio, Muhammad TariqueDilshad, Syed Muhmmad RaihanGohar, AliZahid, HafsaAli, Abid

Background: Addition of the antioxidant to extender media is the most appropriate attempt to reduce structural lossesencounter during the process of cryopreservation. Hence semen excellence could be maintained for longer duration withoutadverse impact. Additionally antioxidants are not only capturing the reactive oxygen species but also improve the spermquality indicators and fertility. Accordingly, current elucidation has been executed to explore the dose depended appraisalof varied concentration of α-tocopherol in Tris-based extender on frozen-thawed bull semen quality parameters for enhancement of bull semen cryopreservation in the subtropical ecosystem of Peshawar.Materials, Methods & Results: Experiments were carried out on semen that has been collected from both Achai-an indigenous breed and Holstein Friesian (HF) - the exotic breed in artificial vagina maintained at 42°C from the experimentalbulls of either breed and processed independently breed wise. Semen specimens with above 70% motility were evaluatedseparately breed-wise under same environmental condition. Standard procedure was adopted to extend the collected semenin the experimental extenders and frozen subsequently. After thawing, further Analysis of the frozen straws of semen wascarried out for sperm excellence indicators that include motility, viability, acrosomal integrity and functional integrity ofspermatozoa under the subtropical condition. Sperm viability and acrosomal integrity were determined by dual stainingprocedure i.e. Trypan-blue and Giemsa stains. The hypo-osmotic swelling (HOS) test was used to assess plasma membraneintegrity. The current elucidation demonstrated that α-tocopherol 1.5 mg/mL supplemented in extender had significantly(P < 0.05) increased sperm excellence gauge that includes motilityy, viability, acrosomal integrity and functional membraneintegrity in both the breeds. On the other hand, the result further elucidated...(AU)

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