摘要： 采用689只豫州褐壳蛋鸡Ⅲ系1990～1991年的个体产蛋记录资料，对蛋鸡早期选种中常用的三种方法40周龄个体综合指数法、40周龄总蛋重法和早期优化蛋数法）进行比较表明，40周龄蛋重法的早期选种效果最佳。为加速遗传进展，在不影响早期选种准确度的情况下，留种率在30%～35%或35%～40%时，以选择下限留种为宜，在30%以下的留种率范围，以选择上限留种为宜。

关键词: 蛋鸡, 早期选种, 遗传进展

Abstract: Using individual egg production records of Yuzhou Brown Layer in 1990-1991,three commonly used early selection methods-40、weeks synthetic selection index of individ-uals, 40-week total egg mass and optimum egg number of early periods were compared. The results showed that the best system was "40 -week total egg mass".In order to accelerategenetic advance and not to influence the accuracy of early selection, the proper fraction savedfor breeding is the lower when it is in 30-35% or 35-40%, and the higher is better when it is below 30%.

Key words: Layer, Early selection, Genetic advence

中图分类号: 

• S831.2