湖北黑头羊体重、体尺持续选育研究

Study on continuous breeding of Hubei black-head goats in body weight and size

对湖北黑头羊3个世代的体重、体尺(体高、体斜长、胸围、管围)指标进行统计分析,以评估生长性能方面的选育效果。结果表明,通过3个世代的选育,湖北黑头羊各世代核心群均有所提高,但各世代间增量不同,基本表现为零世代至一世代增长缓慢,一世代至二世代增长最快,二世代至三世代增长最慢,变异系数相对稳定。选育进入第三世代后,体重、体尺指标基本趋于稳定。三世代与零世代相比,体重、体尺指标在各月龄增量显著,母羊体重平均增量为12.45%,体尺平均增量为4.37%;公羊体重平均增量为15.06%,体尺平均增量为7.40%。

This study was aimed to statistically analyze the body weight and size(withers height, body oblique length, heart girth, cannon bone circumference) of Hubei black-head goats in three generations, so as to evaluate the effect of breeding.The results showed that through three generations of breeding, the core group of each generation of Hubei black-head goats has been improved. However, the increment varied from generation to generation, which basically showed that the growth rate was slow growth from zero generation to first generation, fastest growth from first generation to second generation, and slowest growth from second generation to third generation, coefficient of variation was relatively stable. After the third generation of breeding, the indexes of body weight and body size were basically stable. Compared with the body weight and size index of zero generation, that of third generation significantly increased at each month’s age. The body weight average increment of ewes was 12.45%, and the body size increment was 4.37%. The weight increment of rams was 15.06% and the body size increment was 7.40%.