林甸鸡蛋品质性状的遗传参数估计

Genetic Parameter Estimation of Egg Quality Traits in Lindian Chicken

为提高林甸鸡蛋品质性状的选育效果,实验选择300日龄林甸鸡,基于动物模型利用REML方法对蛋重(EW)、蛋黄重(YW)、蛋黄比例(AY)、蛋壳重(ESW)、蛋壳强度(ESS)、蛋壳厚度(EST)、蛋白高度(AH)、哈氏单位(HU)、纵径(ELL)、横径(ESL)和蛋形指数(ESI)等11个主要性状进行遗传参数估计。结果表明:除ESS性状的遗传力较低外(h^2=0.15),其余蛋品质性状都属于中等或高等遗传力性状;EW与描述鸡蛋内部特征的YW、AH,以及描述鸡蛋外部特征的ESW、ELL、ESL等性状存在显著的正遗传相关(P<9.1E-4),且遗传相关较高;ESW、ESS和EST 3个性状间呈显著正遗传相关。

In order to improve the breeding effect of egg quality traits in Lindian chicken, at 300 days old, egg weight（EW）,yolk weight （YW）, egg yolk ratio （AY）, shell weight （ESW）, eggshell strength （ESS）, eggshell thickness （EST）, egg whiteheight（AH）, Haugh unit （HU）, long length of egg （ELL） and short length of egg （ESL） and egg shape index （ESI） traitsgenetic parameters were estimated by REML method based on the animal model. Results showed that the egg quality traitsare moderate or high heritability, except ESS （h2=0.15）. There are significant positive genetic correlation between EW andYW, AH, ESW, ELL and ESL（P〈9.1E-4）. There are significant positive genetic correlation, among ESW, ESS and EST.