Korean Journal of Animal Reproduction (한국가축번식학회지)

The Korean Society of Animal Reproduction (한국동물번식학회)
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Effect of Recombinant Bovine Somatotropin (rbST) Treatment on Concentration of Progesterone, Volume of Luteal Tissue and Pregnancy Rate in Hanwoo

한우에서 rbST 처리가 Progesterone 농도와 황체의 크기 및 수태율에 미치는 영향

  • 정세환 (순천대하교 농업생명과학대학 동물자원과학과) ;
  • 공일근 (순천대하교 농업생명과학대학 동물자원과학과)
  • Published : 2003.09.01
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Abstract

The purpose of this study was to determine the effect of rbST treatment on progesterone concentration, volume of luteal tissue and pregnancy rate following embryo transfer. Recipient cows were assigned to control and rbST group, of which was given a single injection of rbST (500 mg. sc) at estrus detection. The concentration of progesterone was not significantly different between control and at 0, 3, 6 days after rbST treatment. However, the concentration of progesterone at 9, 12 days was significantly higher than in control group (4.6 and 6.8 vs. 3.9 and 4.5 ng/ml P4). The pregnancy rate after embryo transfer in rbST treatment was significantly higher than in control group (64.0 vs. 47.1 %; p<0.05). The results indicated that rbST treatment in recipient cows could be improved the efficiency of pregnancy rate after embryo transfer.

본 연구는 과배란처리에 의한 수정란이식 시 우수한 수정란을 다량 확보하고 이식 후 수태율 향상을 위하여 수란우에 rbST처리가 수태율 및 progesterone 농도와 황체의 크기에 어떠한 영향을 미치는가를 조사하고자 실시하였다. 공란우는 Folltropin-V와 PGF$_2$$\alpha$를 이용하여 과배란처리를 유도하여 12시간 간격으로 2 straw씩 3회 인공수정을 실시하였다. 공란우와 수란우는 대조구와 rbST 처리구로 구분하였으며, rbST (500 mg)처리는 발정발현 후 미근부에 근육 주사하였다. 과배란처리된 공란우의 수정란채란은 수정 후 7∼8일째에 비외과적인 방법으로 실시하였다. 수정란이식 후 수태율은 rbST 처리구에서 대조구보다 유의적으로 높았다 (64.0 vs. 47.1%; p<0.05). 채취한 혈액의 progesterone 농도 분석과 황체의 단면적를 조사한 결과 progesterone 농도는 대조구와 rbST 처리구에서 6일 동안 차이가 없었지만, 6일 이후부터 차이가 나타났으며 황체크기 역시 rbST 처리구에서 대조구에 비해 높게 나타났다. 본 연구결과에서 rbST처리는 이식 후 수태율의 향상시킬 수 있을 것으로 판단된다.

Keywords

References

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