Study on Dairy Cattle Embryo Transplantation in Guangxi Yellow Cattle as Recipient

In this study,42 pieces of available embryos obtained from superovulation of 11 holstein cows were transplanted into 19 Guangxi cattle and 18 low-yield holstein cows respectively.Results showed that the pregnancy rate of Guangxi cattle pregnancy rate was 36.81%,including five females and 2 males.Holstein cow's pregnancy rate was 44.44%,2 cows were abortioned,the abortion rate is 25%.And 6 calves were born containing 3 males and 3 females respectively.The birth weight of newborn catties of Holstein cows embryos was obviously different between Guangxi cattle receptors and Hosteins',but after cultivating and breeding,the weight difference were diminishing gradually,no difference was found in milk performance.Guangxi cattle can be used as the recipient of Holstein embryo transplantation,the fertility rate can be improved by raising management and economic benefit can be achieved from the well-cultivated of Holstein embroyo.