Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Survival Rate, Developmental Competence and Sex Ratio of Post-thawed Hanwoo Embryo Following Biopsy

한우 수정란의 Biopsy 후 배발달율과 동결-융해후 생존성 및 성비

  • Cho, S.R. (National Livestock Reserch Institute, RDA) ;
  • Choi, S.H. (National Livestock Reserch Institute, RDA) ;
  • Kim, H.J. (National Livestock Reserch Institute, RDA) ;
  • Choe, C.Y. (National Livestock Reserch Institute, RDA) ;
  • Jin, H.J. (National Livestock Reserch Institute, RDA) ;
  • Cho, C.Y. (National Livestock Reserch Institute, RDA) ;
  • Son, D.S. (National Livestock Reserch Institute, RDA)
  • Published : 2007.04.30
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Abstract

The present study was to conducted the sexing efficiency and accuracy of bovine embryo by LAMP (Loop-mediated isothermal amplification) method, the development of the biopsied embryos into re- reformation and the freezability of these blastocysts by slow-freezing and vitrification. In vivo embryos were superovaluted with gonadotropin(Antorin R-10) for 4 days combined with progestrone releasing intravaginal(CIDR) insertion in Hanwoo donors, and in vitro embryos were used blastocyst embryos at Day 7 or Day 8 after post-insemination in vitro. The biopsy of bovine embryo was carried out in a 80μl drop with Ca2+-Mg2+ free D-PBS and the viability of biopsied embryos were evaluated in IVMD medium at over 12 h culture time in 5% CO2 incubator.For embryo sexing, about five or seven blastomeres were isolated from in vitro and in vivo embryos at blastocysts with microblade. and were then subjected to LAMP. The survivability of biopsied embryos were no difference in the development rate to re-formation of blastocysts between in vivo and in vitro embryos(100% and 90% respectively). The rates of sexed embryos were compared according to two groups, the female rate was lower than that the male in the in vivo and in vitro embryos(46% vs, 54% and 40% vs, 60%, respectively). However, there were no difference in the overall sexing ratio between the two groups. The survivability of frozen-thawed sexed embryos were lower in the in vitro than in vivo embryos in the slow-freezing(Group 1) and vitrification method(Group 2), (41.7% vs. 58.8% and 57.1% vs, 77.8. respectively).

성판별을 위한 biopsy 후 수정란의 발달율 및 동결－융해 후의 생존율 조사는 다음과 같다. 한우 체내 및 체외 수정란의 성판별을 위해서 영양막 세포의 일부를 채취하기 위해서 수정란을 biopsy 하였다. biopsy된 수정란의 생존율 조사의 결과는 체내 수정란이 100% 그리고 체외수정란이 90.0%의 결과를 나타내어 체내 수정란이 체외 수정란 보다 biopsy 후의 생존율이 높게 나타났음을 알 수 있었다. 수정란의 성판별 비율은 체내 수정란에서는 암컷과 수컷의 비율이 46.3%와 53.7%로 각각 나타나 수컷의 비율이 암컷 보다 다소 높은 경향을 보였으며, 체외 수정란에 있어서는 암컷과 수컷의 비율은 40.0% 와 60.0%로 수컷의 비율이 높게 나타났으나 유의적인 차이는 보이지 않았다. 성판별된 수정란의 동결－융해 후 생존성은 완만동결 방법에 의한 수정란의 생존율은 체내 수정란에서 58.8 %, 체외 수정란에서는 41.7% 그리고 초자화동결 방법에서는 체내 수정란의 생존율이 77.8%, 체외 수정란은 57.1%로의 결과를 보여 체내 수정란을 이용한 초자화동결 방법에서 상대적으로 더 높은 생존율을 보였다.

Keywords

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