乔科型藏羊种羊选育效果分析

Analysis of the Selection and Breeding Effect of Qiaoke Tibetan Sheep

摘要:

乔科型藏羊种羊选育,有效提高了母羊群受胎、妊娠、产羔、育羔及繁活率,从而保证繁育后代的优良品质。2022 年对选育核心群324只羊进行整群,淘汰部分劣质和老龄母羊及等外羊只后,种公羊及后备公羊占11.9%,适龄母羊占羊群的65.7%,（其中特级占13.6%、一级占31.4%、二级占32.5%、等外占22.5%）,其它羊占22.4%。经连续两年的严格选育,后备种公羊数量和适龄母羊优秀个体比例明显增加,母羊特级和一级分别提高了3.5%和7.1%。经过种羊选育,提高了羊群整体生产水平,降低草场压力,提高经济效益。

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.