Crossbreeding Effect of Poll Dorset with Qinghai Semifine Wool Sheep

Qinghai semifine wool sheep was hybridizeol with Poll Dorset Sire to observe the crossbreeding effect.The results showed that the birth weight and weaning weight of F1 male and female lamb increased 0.16 and 4.27kg,0.14 and 4.17kg than those of Qinghai semifine wool sheep,respectively.The withers height of F1 male and female lamb at the age of four months increaseol 6.27 and 4.21cm and the body length increased 5.39 and 4.81cm than that of Qinghai semifine wool sheep,recpectively.The wool fineness of F1 was not signifieant difference with that of Qinghai semifine wool sheep(P0.05),The carcass weight of F1 male and female lamb increased 6.74 and 4.09kg and the dressing percentage of them increased 6.55 and 5.52 percent points at the age of six months,respectively.