한국가금학회지 (Korean Journal of Poultry Science)

  • 제45권4호
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  • Pages.237-244
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  • 2018
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  • 1225-6625(pISSN)
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  • 2287-5387(eISSN)
한국가금학회 (The Korean Society of Poultry Science)
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닭 동결정액 융해방법이 정자 운동성에 미치는 영향

Motility of Rooster Spermatozoa under Different Thawing Conditions

  • 김성우 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 최승례 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 고응규 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 전익수 (농촌진흥청 국립축산과학원 가축유전자원센터)
  • Kim, Sung Woo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Choe, Seung Rye (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Ko, Yeoung-Gyu (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Jeon, Ik Soo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
  • 투고 : 2018.12.03
  • 심사 : 2018.12.19
  • 발행 : 2018.12.31
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초록

본 연구에서는 닭 동결 정액의 융해 방법에 따라 정자 운동성의 변화도를 분석하였고, 적절한 융해방법에 대한 자료를 확보하였다. 동결정액을 융해하는 방법은 축종에 따라 서로 다른 열전달 효율을 제시하기도 하나, 닭 동결 정액에 대한 연구는 미진한 상태이다. 특히 닭 정액은 고 농도의 정액을 필요하기 때문에 이러한 요인에 대한 정자 운동성은 변이가 많은 것으로 알려져 있다. 그러므로, 닭 정액 융해에 필요한 온도는 $5^{\circ}C$임을 알 수 있었으며, 닭 농장에서 동결정액의 융해를 실시할 때, 알코올이 함유된 냉각수를 이용하게 되면 냉각수의 과냉각 생태를 방지할 수 있음을 관찰하였다. 또한, 동결정액을 이용한 인공수정을 실시할 때, 현장에서 직접 닭 정액을 융해하여 시간을 절약할 수 있으며, 인공 수정 작업시간이 30분을 넘기게 되면 정자의 운동성은 감소하여 수정율에 영향을 미치는 것으로 판단된다. 그러므로, 농가에서 동결정액을 활용할 경우, 융해에 신경을 써야 하며 정확한 방법을 적용하여야 수정란의 부화율 감소현상을 막을 수 있을 것으로 보인다. 이와 같이 본 연구에서 제시된 방법으로 동결정액을 이용할 때, 동결정액의 수정율이나 부화율의 변이를 막을 수 있고, 동결 정액을 활용한 가금종축생산 효율이 높아질 것으로 판단된다.

In this study, to increase the survival rate of frozen/thaw rooster semen, standard protocols of semen thawing procedures were tested by computer-assisted sperm assay (CASA). We tested 4 different thawing protocols for frozen semen, $5^{\circ}C$ for 2 min, $35^{\circ}C$ for 30 s, $54^{\circ}C$ for 13 s, and $70^{\circ}C$ for 7 s. The pooled semen from 5 to 8 Ogye rooster line was diluted in the HS-1 diluent and frozen in 8% methylacetamide (MA) in liquid nitrogen vapors. To determine standard thawing method, straws were plunged into different temperatures and times. The resulting motilities were recorded by the CASA system. The results of this study showed that the best viability of the spermatozoa was shown by exposure at $5^{\circ}C$ for 2 min. Moreover, the longevity test of thawed sperm at $5^{\circ}C$ for 2 min also supported the higher viability under low temperature preservation of $17^{\circ}C$ for 1 hr. Further research is needed to increase the motility of thawed rooster semen for field application. In addition, the in vivo tests for different rooster lines are also needed for the establishment of avian genetic resource bank.

키워드

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