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This research was aimed to study the effect of administration of glycerol and dimetilacetamida (DMA) in BTS ® and MIII ® extender supplemented with sodium dodecyl sulphate (SDS) on boar frozen semen. A number of four boars were used in this study for semen collection (n=20). The collected semen was evaluated both macroscopically and microscopically. In this study, only the semen that demonstrated>70% sperm motility, >200.10 6 /mL sperm concentration, and<20% sperm abnormalities were used and divided into eight tubes. A number of 4 tubes were diluted with 5 mL of BTS, and the rest with 5 mL MIII. The sampel was stored at 20-22° C for 2 hours, followed by centrifugation for 15 minutes (at 2000 rpm), and taken of pellet with 1 ml supernatant. The pellet that was resulted from centrifugation using BTS, then re-diluted with BTS-glycerol 5% (BTS G ), BTS DMA 5% (BTS D ), BTS-glycerol 5% and SDS (BTS G-S ), BTS-DMA 5% and SDS (BTS D-S ). Four other pellets that were centrifuged with MIII also re-diluted with MIII-glycerol 5% (MIII G ), MIII-DMA 5% (MIII D ), MIII-glycerol 5% and SDS (MIII G-S ), MIII-DMA 5% and SDS (MIII D-S ). Next, all of diluted semen were inserted into 0.5 mL straw and equilibrated for 2 hours (4° C), then frozen and stored in liquid nitrogen. The evaluation of frozen semen quality was conducted at 24 hours after frozen. The result of this study showed that post-thawing motility of spermatozoa in BTS D - S (40.17±0.2%) was found higher (P<0.05) compared to seven other dilution processes. Therefore, it is concluded that the concentration of 5% DMA that supplemented with SDS in BTS dilution much better for maintaining boars frozen semen quality.

THE QUALITY OF BOAR FROZEN SEMEN DILUTED IN BTS® AND MII® WITH DIFFERENT CRYOPROTECTANT SUPPLEMENTED WITH SODIUM DODECYL SULPHATE