Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
권호 표지

The Studies on In Vivo Embryo Production and Transfer in Hanwoo - II. Factors Influencing Pregnancy Rate after Embryo Transfer

한우에 있어서 체내수정란의 생산과 이식에 관한 연구 - II 한우 수정란 이식이 수태율에 미치는 요인

  • 김덕임 (농협중앙회 가축개량사업소) ;
  • 서상원 (농협중앙회 가축개량사업소) ;
  • 정재경 (농협중앙회 가축개량사업소) ;
  • 이규승 (충남대학교 농과대학) ;
  • 서길웅 (충남대학교 농과대학) ;
  • 박창식 (충남대학교 농과대학) ;
  • 정영채 (중앙대학교 축산학과) ;
  • 박병권 (공주대학교 영상보건대학 특수동물학과)
  • Published : 2002.04.01
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Abstract

These studies were carried out to establish an effective in vivo embryo transfer methods in Hanwoo by analyzing several factors that influence this process. In an embryo transfer, recipients with grade A corpus luteum of the right ovary and that of grade B of the left one showed a higher pregnancy rate(p<0.1) than others. The pregnancy rates of frozen embryos were significantly lower(P<0.01) than those of fresh ones; the former resulting in 35% and the latter resulting in 56.2%. Transfer of embryos according to the estrus cycle(6.0 ∼ 9.0 days) did not show a significant difference in pregnancy rate with fresh embryos recording 45.4 ∼65.7% and frozen ones recording 22.0 ∼ 50.0%. According to the status of corpus luteum and embryo freezing or not, the pregnancy rate was higher on grade A corpus luteum with 40.8 ∼67.9% than B and C which ranged from 25.0∼56.0%. The results of embryo transfer according to the development stage and grade of embryos showed that regardless of the embryo's grade. transfer of morula recorded an average pregnancy rate of 46.3%. This results higher than the transfer of blastocyst which was 34.1%.

본 연구는 기존의 수정란 이식기술을 다각적으로 분석하고 개선하여 한우 체내수정란의 생산 및 이식기술 체계를 확립하기 위하여 수행하였다 수정란의 생산 및 이식은 농협중앙회 가축개량사업소 한우개량부에서 사육하고 있는 공란우 232두와 수란우 434두를 이용하여 실시하였다. 본 연구에서 얻어진 결과를 요약하면 다음과 같다. 1. 수란우의 황체 위치와 등급에 따라 수정란이식을 실시한 결과는 오른쪽 난소의 A등급 황체, 왼쪽 난소의 B등급 황체가 존재할 경우가 유의적(P<0.1)으로 높은 수태율을 나타냈다. 2. 동결수정란을 이식했을 때의 수태율을 35.0% 로서 신선수정란의 수태율 56.2%에 비하여 유의(P<0.01)하게 낮았다. 3. 수란우의 발정일차(6.0∼9.0일)에 따라 수정란을 이식한 격과는 신선수정란에서 45.4∼65.7%, 동결수정란에서 22.0∼50.0%의 임신율을 나타내서 처리간에 유의성이 인정되지 않았다. 4. 수란우의 황체등급과 수정란의 동결 여부에 따른 임신율을 신선 및 동결수정란 모두에서 A등급의 황체일 경우가 40.8∼67.9%로 B 및 C등급 황체의 25.0∼56.0%보다 양호할 성적을 나타냈다. 5. 수정란의 발육단계 및 등급에 따라서 이식한 결과는 상실배의 이식이 수정란의 등급에 관계없이 평균 46.3%의 임신율을 나타내 어서 배반포배 이식의 34.1%보다 높게 나타났다.

Keywords

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