This study was aimed to evaluate the effect of addition of reduced glutathione (GSH) to the extender on the rooster's semen quality parameters and fertility potential. Semen samples were diluted with Lake extender contained 0, 0.5, 1, 2, 4 and 8 mM GSH. Then, were chilled to 5 °C and stored for a period of 48 h. Sperm motion characteristics, viability, membrane integrity, lipid peroxidation, mitochondrial activity and fertility potential were evaluated. At the initiation of the experiment (0 h), GSH did not affect sperm parameters, while 2-4 mM GSH improved (P ≤ 0.05) quality indicators during storage periods. Moreover, the samples treated with 2-4 mM GSH have had a lower lipid peroxidation compared to other groups (P ≤ 0.05). Artificial insemination using the semen samples, which had been stored in groups treated with 2-4 mM GSH for a period of 24 h, led to greater (P ≤ 0.05) fertilizing potential compared to the control group.
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