蛋鸡早期选种最优方法  

Optimum System of Early Selection of Layer

作　　者：康相涛[1] 赖银生[1] 王俊士[1] 李明[1] 郭诚[1] 宋素芳[1] 

机构地区：[1]河南农业大学,郑州牧业工程高等专科学校

出　　处：《华北农学报》1994年第4期119-123,共5页Acta Agriculturae Boreali-Sinica

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。Using individual egg production records of Yuzhou Brown Layer in 1990-1991,three commonly used early selection methods-40 weeks synthetic selection index of individuals,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 accelerate genetic advance and not to influence the accuracy of early selection,the proper fraction saved for breeding is the lower when it is in 30-35% or 35-40%,and the higher is better when it is below 30%.

关 键 词：鸡 卵用鸡 选种 早期选种 遗传进展 最佳化 

分 类 号：S831.2[农业科学—畜牧学]