美国银黑狐级进杂交效果分析

Analysis on the effect of grading-up crossbreeding for American silver-black fox

为了探讨引进的美国银黑狐种公狐对本地银黑狐的杂交改良效果,试验采用级进杂交改良方法统计分析496只杂交狐的生长发育资料。结果表明:本地银黑狐、F1代、F2代、F3代之间在分窝、3月龄、5月龄、8月龄、成年各时期体重、尾长差异均极显著(P<0.01);本地银黑狐与F1代在分窝、3月龄、5月龄、8月龄、成年各时期体长差异均极显著(P<0.01),F1代、F2代、F3代在分窝、3月龄、8月龄、成年各时期体长差异均显著(P<0.05),而在5月龄阶段差异极显著(P<0.01)。

To investigate the improved crossbreeding effect of the introduce male American black silver silver -black fox on the local fox, the method of grading - up crossbreeding improvement was used for the statistical analysis of the growth data from 496 hybrid foxes. The results showed that there were highly significant differences（ P 〈 0.01 ）in the body weight and tail length of local silver- black fox, the F1, F2 and F3 generations in each period of sub - nest, the 3, 5 and 8 months of age and adult foxes. There were highly significant differences（ P 〈 0.01 ） in the body length between local silver - black fox and the F1 generation in each period of sub - nest, the 3, 5 and 8 months of age and adult fo- xes. There were significant differences（ P 〈 0.05 ）in the body length of the F1, F2 and F3 generations in each period of sub - nest, the 3 and 8 months of age, and adult foxes, while there was a highly significant difference（ P 〈 0.01 ） in the body length at the stage of 5 months of age.