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KMID : 0900920020260020119
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Korean journal of Animal Reproduction
2002 Volume.26 No. 2 p.119 ~ p.124
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Effect of Packing Materials of Frozen Boar Semen on Sperm Characteristics and Reproductive Performance
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Kim I. C.
Lee Chang-Hee
Lee Seung-Ho
Park Chang-Sik
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Abstract
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This study was carried out to investigate the effects of packing materials of frozen boar semen to improve reproductive performance efficiency in pig. Boars were raised at Swine Artificial Insemination Center in National Livestock Research Institute, Sunghwan, Chungnam, Korea. We compared packing protocols for frozen boar semen among 5mell maxi-straw, 5mell cryogenic-vial, and aluminum-pack. Cryogenic-vial packing material showed similar sperm characteristics compared with maxi-straw packing material when the sperm was frozen above 15cm from liquid nitrogen and thawed at 52^{circ}C for 190 seconds. We investigated different thawing times to find out the optimal condition of freezing and thawing protocol with cryogenic-vial. Freezing above 15cm from liquid nitrogen and thawing at 52^{circ}C for 190 seconds were the optimal protocol compared with 120 and 150 seconds. However, normal acrosome rates did not show any differences among thawing times. Post-thawing results of maxi-straw in water at 52^{circ}C for 45 seconds had better total motility and curve linear velocity than those of cryogenic-vial in water 52^{circ}C for 190 seconds. However, there were no differences on straightness and normal apical ridge of sperm between maxi-straw and cryogenic vial. Non-return rate, farrowing rate and litter size of sows inseminated with frozen boar semen of commercial farms were higher in the maxi-straw than cryogenic-vial, but there were no significant differences between maxi-straw and cryogenic-vial. In conclusion, there were no significant differences between maxi-straw and cryogenic-vial and so, we may replace cryogenic-vial packing method instead of maxi-straw packing method by improvement of freezing and thawing rate.
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KEYWORD
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Packing materials, Frozen boar semen, Cryogenic vial, Maxi-straw
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