Abstract:The selection and breeding of Qiaoke Tibetan sheep has greatly improved the fertility,pregnancy,lambing,breeding,and survival rates of the female sheep population,thereby ensuring the excellent quality of the offspring.In 2022,324 sheep from the selected core group were grouped,and after excluding some inferior and elderly female sheep and other sheep,the number of male sheep and reserve male sheep accounted for 11.9%,the number of suitable-aged female sheep accounted for 65.7% of the flock,including 13.6% for the special grade,31.4% for the first grade,32.5% for the second grade,and 22.5% for the other grades.The number of reserve male sheep and the proportion of excellent individual female sheep among the suitable-aged female sheep increased significantly after two years of strict selection and breeding.The special-grade and first-grade female sheep increased by 3.5 percentage points and 7.1 percentage points,respectively.This improved the overall production level of the sheep flock,reduced the pressure on the grassland,and increased economic efficiency.
