Journal of Convergence for Information Technology (융합정보논문지)

Convergence Society for SMB (중소기업융합학회)
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Effect of Cryoprotectants on the Cryopreservation of Manila Clam, Ruditapes philippinarum Embryo

바지락 발생배의 냉동보존에 관한 보존액의 효과

  • 강경호 (전남대학교 양식생물학과)
  • Received : 2020.12.16
  • Accepted : 2021.01.20
  • Published : 2021.01.28
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Abstract

The possibility and effectiveness of cryopreservation was determined to assess survival rates and improve stock management of thawed embryos of Manila clam, Ruditapes philippinarum. The ideal freezing rates were designed and tested to allow cryoprotectants to equilibrate across the membrane during freezing. Survival rates ranging from 0 to 64.3% were obtained using a stepwise freezing protocol compared with 82.3% control rates. Embryos of Ruditapes philippinarum were equilibrated in 2 CPAs plus sea water for 10 min at 25℃ and then cooled at -1℃/min from 20℃ to -12℃. Straws containing more than 100 embryos were held at 12℃ for 5 min allowing equilibration after seeding and slowly cooled at 2℃/min. to -35℃ for 30 min for equilibration before quenching in liquid nitrogen. Dimethyl sulfoxide (DMSO) is the best cryoprotectant indicated for embryos of R. philippinarum with a survival rate of 64.3±3.28% in the presence of 2.0 M DMSO.

바지락 발생배의 냉동보존을 위한 동해방지제의 효과를 규명하기 위하여4종의 보존액, dimethyl sulfoxide, ethylene glycol, glycerol 및 1,2-propanediol을 사용하여 발생배의 생존율을 조사한 결과로, 생존율의 범위는 0-64.3%였고, 대조구의 생존율은 82.3%을 보였다. 발생배의 냉동보존을 위한 프로그래 동결 과정은 최초 25℃에서 10분 동안 유지하다가 자동 냉동보존 프로그램 장치에 의하여 -12℃까지 분당 -1℃씩 조정하였으며 -35℃까지는 분당 -2℃씩 하강시켜 액체 질소통에 스트로우를 넣어 해동 후 관찰한 결과, 바지락 생존율은 DMSO(dimethyl sulfoxide) 2.0M 실험구에서 64.3%로 가장 좋은 결과를 보였다.

Keywords

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