Study on Breeding Effect of Qiaoke Tibetan Sheep

Abstract:

The average birth weights of male and female lambs were 3.98±0.95 and 3.75±0.87 kg in the breeding core group of qiaoke tibetan sheep.The performance (body height,body length,chest circumference and body weight) of 6monthold male lambs in the selected group were increased by 4.15 cm,4 cm and 3.35 cm and 3.00 kg,respectively,compared with the nonselected group.The production performance (body height,body length,chest girth and body weight) of female lambs in the selected group were increased by 3.7 cm,3.71 cm and 2.65 cm and 2.74 kg,respectively,compared with those in the unselected group.The production performance (body height,body length,chest circumference and body weight) of 18monthold RAMS in the selected group was increased by 2.67 cm,3.1 cm,2.98 cm and 5.51 kg,respectively,compared with the nonselected group.The performance (body height,body length,chest circumference and body weight) of ewes in the selected group were increased by 2.60 cm,2.80 cm,1.20 cm and 3.00 kg,respectively,compared with those in the unselected group.The average body weight of adult male and female sheep was 66.8±4.1 and 58.92±4.57 kg,and the average body weight of adult male and female sheep in unbred herds was:63.00±3.82 and 56.44±3.71 kg were increased by 3.8 kg and 2.48 kg,5.83% and 4.33%,respectively.The body height,body length and chest circumference of adult male and female sheep in the selected group were increased by 3.46 cm,3.96 cm and 5.69 cm,respectively,compared with those in the unselected group.3.60 cm,3.80 cm,4.60 cm.After two years of strict selection according to the breeding standards,the structure of the core flock of sheep was adjusted and optimized significantly,the number of reserve breed RAMS meeting the standards increased,and the proportion of excellent ageappropriate ewes was significantly increased,among which the special grade and the first grade were increased by 5.2 and 9.7 percentage points respectively,and the reproductive survival rate was increased by 2.1 percentage points.The breeding results of qiaoke tibetan sheep were satisfactory.