Effect of Packing Materials of Frozen Boar Semen on Sperm Characteristics and Reproductive Performance

동결정액 포장방법이 돼지정액의 성상 및 번식성적에 미치는 영향

  • Published : 2002.06.01

Abstract

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 5$m\ell$ maxi-straw, 5$m\ell$ 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.

본 연구는 돼지에서 동결정액을 이용한 번식능력을 개선하기 위한 동결정액 포장재료의 효과를 구명하기 위하여 실시하였다. 본 시험에는 축산기술연구소 종축개량부 (충남, 성환)의 인공수정센터에서 사육중인 종모돈이 사용되었다. 기존의 돼지 동결정액 포장방법인 maxi-straw 동결정액 포장방법과 5$m\ell$빈 cryogenic-vial 및 aluminum-pack 포장방법을 비교한 결과 cryogenic-vial로 포장하여 액체질소 상단 15cm에서 동결한 후 52$^{\circ}C$ water bath에서 190초 융해한 방법이 기존의 maxi-straw 방법과 비슷한 결과를 나타내었다. Cyogenic-vial 포장방법의 동결-응해 방법을 설정하기 위하여 융해시간을 달리하여 시험한 결과 액체질소 상단 15cm에서 동결하고 52$^{\circ}C$에서 190초 간 융해하였을 때 정자운동성이 120초 및 150초 응해시 보다 우수하였다 (P<0.05). 그러나 정상첨체비율은 응해시간 간에 차이가 없었다. 52$^{\circ}C$에서 45초간 응해 한 maxi-straw 포장방법과 52$^{\circ}C$에서 190초 융해한 cryogenic-vial 포장방법간에 정액성상을 비교한 결과 총정자운동성과 정자의 빠르기는 maxi-straw가 우수하였다 (P<0.05). 그러나 직진성과 정상첨체비율은 두 포장방법간에 차이가 없었다. 동결정액 포장방법별 인공수정시 번식성적은 maxi-straw 동결정액이 cryogenic-vial 동결정 액보다 수태율, 분만율, 그리고 산자수가 높았으나 통계적 유의차는 인정되지 않았다. 이상의 결과를 종합해 보면 cryogenic-vial 포장 방법의 동결 및 음해방법을 좀 더 연구개발하면 기존의 maxi-straw포장방법을 대체하여 실용화 할 수 있을 것으로 사료된다.

Keywords

References

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