Effects of Different Equilibration Times on Post-Thaw Cryopreserved Semen Quality of Cattle and Buffalo Bulls
Effects of Different Equilibration Times on Post-Thaw Cryopreserved Semen Quality of Cattle and Buffalo Bulls
Adnan Khan1, Rifat Ullah Khan1, Muhammad Subhan Qureshi2, Muhammad Mobashar3, Ali Gohar4, Shakoor Ahmad1, Kamran Khan5, Hamayun Khan1 and Shabana Naz6*
ABSTRACT
Nine mature bulls were selected in three (n=9) different groups (Holstein Fresian, Jersey and Nili Ravi) to find out equilibration time (T1, 2 h; T2, 6 h and T3, 6 h) effects on different semen quality parameters. Highest sperm progressive motility, sperm plasma membrane integrity were observed in T2. It reflects high damages at T3 and T1 due to cryo shock and oxidative stress respectively. Sperm DNA integrity and pH were increased linearly from T1 to T3. The dead sperm percentage was significantly (P<0.01) low in groups with semen sample treated with T2 compared to other groups. Significantly (P<0.01) high sperm individual motility percentage was observed for T2 than T3 and T1. Sperm acrosomal integrity percentage showed significantly ((P<0.01) high value in T2. It is concluded that 4 h equilibration time improved semen qualitative characteristics. Among the three breeds, Jersey bull semen samples showed the best quality. Equilibration time of 2 and 6 hours showed detrimental effect on the semen quality.
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April 2021
Vol. 53, Iss. 2, Pages 401-800
