Down sheep
1.A experiment of embryo transfer of Dorset Down sheep embryos which were producted by Austraria was conducted and the native Qinghai semifine-wool sheep was the receptor in the area around Qinghai-lake. The numbers of frozen embryo transfer were 60 and the lambing numbers were 28.The pregnancy rate of embryo transfer was 46.67% and the survival rate of lamb was 100%.


