Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Comparison of AndroMed and Tris-egg Yolk Extender for Cryopreservation of Korean Native Bull Semen (Chick Cow)

칡소 정액 동결을 위한 AndroMed와 Tris-egg Yolk 희석제의 동결성 비교

  • Cho, Sang-Rae (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Kim, Sung-Jae (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Son, Jun-Kyu (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Choi, Sun-Ho (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Choe, Chang-Yong (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Ko, Yeoung-Kyu (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Lee, Poong-Yeon (Animal Genetic Resources Station, National Institute of Animal Science, RDA) ;
  • Kim, Hyun-Jong (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
  • 조상래 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 김성재 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 손준규 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 최선호 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 최창용 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 고응규 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 이풍연 (농촌진흥청 국립축산과학원 가축유전자원시험장) ;
  • 김현종 (농촌진흥청 국립축산과학원 가축유전자원시험장)
  • Received : 2011.02.26
  • Accepted : 2011.03.03
  • Published : 2011.03.31
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Abstract

This study was conducted to investigate the survival rate of AndroMed and Tris-egg yolk extender for cryopreservation of Korean Native Bull Semen (Chick Cow). Semen was collected from a Korean Native Bull Semen over 3 year's old. The semen was diluted 1:1 by AndroMed and Tris-egg yolk extender. The pellet was diluted to final sperm concentration of $5{\times}10^7$ cell/ml by doubling in every 10 minutes at $4^{\circ}C$ cold chamber. The semen was equilibrated for 1 hrs at cold chamber and packed to 0.5 ml straw. The semen straws were located above 5 cm of liquid nitrogen for 5 minutes. And then the frozen straw was plunged to LN2. The presented straws were examined the viability and motility after thawed at $37^{\circ}C$ water bath. The survival rates was significantly higher (p<0.05) in Tris-egg yolk extender than AndroMed extender ($89.7{\pm}19.8$ vs. $73.4{\pm}11.2$). However, motility was no significant differences ($78.4{\pm}18.7$ vs. $67.9{\pm}14.6$). Survival rate in time of equilibration between visual and CASA program had higher in 2 h ($86.33{\pm}9.4$ vs. $92.32{\pm}12.4$) than in 5 h ($78.20{\pm}7.8$ vs. $88.28{\pm}13.1$) 15 h ($65.24{\pm}6.6$ vs. $76.48{\pm}17.3$) 20 h ($56.26{\pm}4.6$ vs. $67.73{\pm}18.4$). The development rates to cleavage was higher in Tris-egg yolk extender than AndroMed extender (82.2% vs. 81.7%). Similarly, the development rates to blastocyst was significantly higher (p<0.05) in Tris-egg yolk extender than AndroMed extender (42.3% vs. 29.6%). In conclusion, the obvious impact of this study will be its practical application to improve viability and fertilizing ability of cryopreserved spermatozoa used for in vitro fertilization (IVF) and AI, Which in turn will be beneficial to animal genetic resources conservation.

희소 한우인 칡소의 정액 동결을 위해서 레시딘을 기본 희석제로 하는 AndroMed와 Tris-egg yolk extender를 사용하여 정자의 생존율과 활력 조사를 위해서 본 연구를 수행하였다. AndroMed 희석제를 사용하였을 때 생존율과 활력은 $73.4{\pm}11.2%$와 $67.9{\pm}14.6%$의 결과를 보였다. 그리고 Tris-egg yolk extender의 경우는 각각 $89.7{\pm}19.8%$와 $78.4{\pm}18.7%$ 결과를 보여 생존율에서는 Tris-egg yolk 희석제가 AndroMed 희석제를 사용하였을 때보다 유의적으로(p<0.05) 높은 결과를 보였다. 그러나 활력에서는 유의적인 차이를 보이지 않았으나 Tris-egg yolk 희석제에서 높은 경향을 보였다. 정액의 동결을 위해서 평형 시간에 따른 정자의 활력 조사를 위해서 육안적 방법과 CASA 프로그램 방법으로 조사를 실시한 결과, 처음 2시간부터 20시간까지 평형을 유도한 결과 육안적 방법보다는 CASA 프로그램 분석 방법의 결과 높은 수치를 확인할 수 있었다. AndroMed와 Tris-egg yolk extender 두 종류의 희석제로 사용된 동결 정액 사용으로 체외수정란을 생산 결과로서 분할율은 유의적인 차이를 보이지 않았으나(81.7% vs. 82.2), 배반포 발달율에서는 29.6% vs. 42.3%로서 Tris-egg yolk 희석제를 사용하였을 때 유의적으로(p<0.05) 높은 발달율을 보였다. 이러한 결과를 볼 때 희소 한우 품종인 침소 정액 동결을 위해서 Tris-egg yolk 희석제 사용이 동결된 정자의 생존율과 수정 능력 개선으로 실제적인 인공수정과 체외수정란 생산 및 가축유전자원 보존을 위해서도 효과적일 것으로 사료된다.

Keywords

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