Abstract #506

# 506
Comparative effect of a commercial and tris-citric-egg-yolk (TCEY) extenders on post-thaw semen quality of Nili-Ravi buffaloes.
A. Sattar*1, M. A. Khan1, S. Ali1, M. Ahmad2, A. A. Channa1, M. U. Mehmood1, A. Husnain1, N. Ahmad1, 1Department of Theriogenology, University of Veterinary and Animal Sciences, Outfall Road, Lahore, Pakistan, 2Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Outfall Road, Lahore, Pakistan.

Semen cryopreservation is crucial to introduce high genetics in buffalo herds through artificial insemination. Success of artificial insemination in Nili-Ravi buffalo (Bubalus bubalis) is limited due to poor freezing ability. The objective of this study was to compare the effect of commercial (Triladyl) and Tris-citric-egg-yolk (TCEY) semen extenders on post- thaw semen quality of Nili-Ravi buffaloes. Semen was collected using an artificial vagina (42°C) twice a week from 3 mature regular donor bulls of Nili-Ravi buffalo (7 replicates). After evaluation, semen was pooled and divided into 2 equal aliquots. These semen aliquots were extended separately in Triladyl and TCEY extenders, to a final concentration of 40 × 106 sperms /mL. After filling in 0.5-mL French straws semen samples were frozen first in liquid nitrogen vapors using automatic freezer (IMV- France) and then stored in Liquid Nitrogen. Post-thaw motility (PTM), Plasma membrane integrity (PMI), Normal apical ridge (NAR), DNA integrity (DI), Live percentage (LP), Sperm abnormalities (SA) were studied using routine procedures. CASA (Pre-freeze and Post- Thaw) motility parameters and kinematics were also studied. Results were compared statistically using paired t-test. Post- thaw semen quality parameters were significantly better (P < 0.05) in Triladyl as compared with TCEY Extender. Pre freeze and post- thaw CASA motility parameters were also better in Triladyl semen extender. Pre-freeze CASA sperm motility kinematics VAP (µm/s), VSL (µm/s), LIN (%) and post- thaw CASA sperm motility kinematics VAP (µm/s), VSL (µm/s), and STR (%) were also found significantly (P < 0.05) better in Triladyl semen extender as compared with TCEY extender. It may be concluded that Triladyl semen extender may be a good choice for buffalo semen freezing as compared with TCEY extender.

Key Words: triladyl, TCEY extender, Buffalo semen