논문 상세보기
pp.79-87
한우 및 젖소에서 체외 수정란을 생산하여 수란 우에 이식하기 위해 도축장에서 난소를 채취하여 난자를 회수한 후 체외 성숙, 체외 수정, 체외 배양과정을 거쳐 수정란을 생산하였다. 체외 수정시 난자는 난구세포 부착 정도에 따라 난할율을 조사하였고, 한우와 젖소에서 체외수정 후 배반포율을 조사하였다. 신선 및 동결 수정란을 수란우에 각각 이식하여 산자 분만에 따른 수태율을 조사하였다. 1. 한우 난소 2,021개에서 20,387개의 난자를 회수하여 체외 수
The ovaries from Hanwoo and Holstein were collected from labattoir and transferred to laboratory. Oocytes were aspirated and incubated in incubator for 24 hours for maturation. Oocytes were coincubated with the sperms for 5 hours. Cleaved oocytes were selected 48 hours after coincubation and half of the medium was changed newly every 48 hour until blastocyst formation. Cleavage rate and blastocyst rate were investigated according to different breeds and different status of cumulus cells surrounding the oocytes. Blastocysts were either transferred to the recipients or frozen until use. The result of embryo transfer with fresh or frozen embryos was investigated. The rate of male offspring following embryo transfer was also investigated. The rate of cleavage was for Hanwoo and for Holstein oocytes. The rate of cleavage according to status of oocyte was shown highest in the oocytes completely surrounded with cumulus cells and lowest in denuded oocytes for both Hanwoo and Holstein oocytes. The rate of blastocyst from cleaved oocytes was for Hanwoo and for Holstein. The rate of pregnancy/delivery following embryo transfer with fresh IVF embryos was for Hanwoo and for Holstein. The rate of pregnancy/delivery following embryo transfer with frozen IVF embryos was for Hanwoo and for Holstein. The rate of male calf produced by embryo transfer was for Hanwoo and for Holstein
