青海高原毛肉兼用半细毛羊经济性状遗传力估测

Estimate of Heritability of Ecomomic Trait for Qinghai Highland Semifine-wool Sheep with Dual-purpose Type of Wool and Meat

对青海省柴达木地区青海高原毛肉兼用半细毛羊9个主要经济性状进行了遗传力估测。结果表明,初生重、断奶重、周岁剪毛量、羊毛细度、毛长、剪毛前体重、剪毛量都是高遗传力性状,也是青海高原毛肉兼用半细毛羊育种过程中的主要选择依据;断奶重、周岁剪毛量、剪毛前体重与剪毛量之间呈强正遗传相关,断奶重可作为对剪毛量进行早期选择的参数;断奶重与羊毛细度之间呈负遗传相关。

The Qinghai highland semifine -wool sheep with Dual- purpose type of wool and meat in Chaidamu region of Qinghai province wese used to estimate the hericability of nine main economic traits of them. The results showed that the birth weight, the weaning weight, the yearling wool yield, the wool fineness, the staple length, the body weight before shearing and the fleece weight were the traits which had high - heritability and these traits were main selective basis in the breeding process of Qinghai highland semifine - wool sheep with dual - purpose type of wool and meat . There was a strong positive heredity -correlatiou between the weaning weight and the fleece weight, the yearling wool yeild and the fleece weight, the body weight before shearing and the fleece weight, and the weaning weight should be regarded as the paramerer of early selection for the fleece weight, There was the negation heredity - correlation between the weaning weight and the wool fineness.