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Superovulation of the Cloned Cattle Derived from Somatic Cells and the Transfer of the Vitrified-Thawed Embryos of the Cloning Cattle

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Agricultural Sciences in China 2004年第12期3卷 937-942页

作者： dongya-juan baixue-jin lijian-dong chengming TheCenterofAnimalEmbryoEngineering LaiyangAgriculturalCollegeLaiyang265200P.R.China

In this experiment, it was designed to carry out superovulation on the two cloned cattles, vitrification and transfer of the embryos recovered from them. First of all, it was carried out vitrification on embryos obtained by IVF. Results showed that there were no significant differences between the blastocysts (obtained by IVF) vitrified in EPS10 and these in EPS20 on the resuscitative rate and the developmental rate. The hatched rate of the blastocysts vitrified in EPS10 (31.3%, 35/112) was significantly higher than that in EPS20 (12.2%, 13/107)(P<0.01), so EPS20 was selected as the vitrification solution to freeze the embryos recovered from the cloned cattle. After superovulation, six (four usable embryos) and ten (nine usable embryos) embryos were respectively recovered from Kangkang and Shuanghuang. Two embryos were selected from the recovered embryos of each cloned cattle to freeze in EPS20, subsequently thawed and transferred into luteal ipsilateral uterine horns of 4 Holstein recipient cows after synchronization of estrus, respectively. At last, one recipient cow (No. 9908) became pregnant and delivered one healthy calf (descendant of the cloned cattle-Shuangshuang). The results of this experi- ment show that the cloned cattle as well as common cattle had better response to the exotic FSH and better ability to multiovulation, the embryos recovered from the cloned cattle can be vitrificated.

关键词： Cloned cattle Superovulation Embryo Vitrification

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