The Research And Applications Of The High Frequency Of Reproductive Technologies

This high frequency of reproductive technologies research is the province of Jilin for the first time to carry on the synchronization of estrus, the super ovulation, the fresh embryo transfer in the season of out of breed; It is the key technique of solving the balanced production of whole year of the meat sheep and insuring the economic performance of the sheep of feeding. The key technique of high frequency of reproduction is to resolve the synchronization of estrus in the out of breed the season. It is to make use of the hormone or adopt some measure to handle the female, to controlling the cycles of estrus, the time and the quantity of ovulation. Carrying on high frequency of reproductive technologies, pressing sheep for a year two produce, two years three produce the calculation, the facilities investment don't increase, and the ewe productivity can raise more than 100%, the performance of production raises 40%-60% above.In 2002 from September 7 to October 8, at the No.14 breeding animal farm of ChangLing we choose 57 black head Suffolk sheep coming from Australia as the donor, choosing the native sheep as the recipient; We carried out super ovulation to the 37 donors, acquiring valid 152 of embryo, Average of 4.1 valid embryos every donor ( The scope at 0-15). We transferred 152 embryos to the 131 recipients, the rate of not to return the feeling is 66%; In 2003 from January 31 to March 2, the transferred recipient produced lamb, the rate of producing lamb is 52.7%(69/131), the rate of live is 88.4%(61/69), the ratio of the male and female lamb is 1:1.26 (27/34) ; the average weight at birth is 4.83 kg, among them, the average weight at birth of male lamb is the 5.01 kg, the average weight at birth of female is 4.69 kg .The Best result of the super ovulation and transfer is acquiring 10 valid embryos and acquiring 7 lambs after transfer.In 2003 April 13 choose 6 Suffolk sheep as donors; the 30 native sheep as the recipient. They were divided into two groups and carried on the synchronization of estrus and the super ovulation. The A groups carried on 3 donors, the rats" of inducing synchronization of estrus is 66.7% of rate (2/3); 15 recipients, the rats of inducing synchronization of estrus is 93.3% (14/15) .The B groups carried on 3 donors, the rats of inducing synchronization of estrus is 100% (3/3); 15 recipients, the rats of inducing synchronization of estrus is 100% (15/15). We recovered 44 ovum, among them having 19 valid embryos, 25 infertilizied ovum. The pregnancy rate is 68.4% (13/19) .