应用随机回归模型分析蛋鸡蛋黄质量遗传参数  

Genetic parameters for yolk weight in resource population with random regression model

作　　者：郭军[1] 王克华[1] 曲亮[1] 沈曼曼[1] 马猛[1] 窦套存[1] 胡玉萍[1] 

机构地区：[1]江苏省家禽科学研究所,江苏扬州225125

出　　处：《南京农业大学学报》2016年第1期145-149,共5页Journal of Nanjing Agricultural University

基　　金：现代农业产业技术体系建设专项资金(CARS-41-K02);国家科技支撑计划项目(2011BAD28B0303);江苏省自然科学基金项目(BK20131237);江苏省科技成果转化专项资金(BA2014132)

摘　　要：[目的]以随机回归模型分析绿壳蛋鸡-白来航鸡资源群体蛋黄质量遗传规律和遗传参数。[方法]收集2011—2014年资源群体2 260只鸡生产记录,整理后获得11 759条蛋黄质量记录,用随机回归模型将Legendre多项式嵌入加性遗传效应、永久环境效应以及固定效应,各周龄以不同的残差效应处理。加性遗传与永久环境效应分别以1~3阶Legendre多项式评估,以AIC、BIC值以及残差值选择最优模型。利用WOMBAT软件以平均信息约束最大似然法（AIREML）分析表型方差组分。[结果]蛋黄质量遗传力为0.43~0.49,重复力为0.61~0.71;蛋黄质量加性遗传方差应嵌入3阶Legendre多项式,永久环境方差应嵌入2阶Legendre多项式;随机误差最低值出现在40周龄,最高值出现在56周龄;加性遗传方差随周龄增加而增加;各周龄之间遗传方差高度相关。[结论]随机回归模型适用于蛋黄质量遗传参数估算;蛋黄质量属于中等遗传力性状。[Objectives]The goal of the present study was to analysis genetic development and parameters for yolk weight in the resource population with random regression model（ RRM）. [Methods]The data were collected from resource population for sequenced three generations from 2011 to 2014. A total of 11 759 yolk weights corresponding to 2 260 hens were evaluated. With RRM,several Legendre polynomials were embedded to estimate the fixed,direct genetic and permanent environment effects. The residual was grouped into 6 variance levels for each test week. 1- 3 order polynomials were used to evaluate the direct additive genetic,permanent environment effects. Models were compared using AIC,BIC and residual values.（ Co） variance components were estimated using AIREML method with WOMBAT software. [Results]The heritability of yolk weights ranged from 0. 43 to 0. 49. The repeatability laid in between 0. 61 and 0. 71. The direct genetic variance of yolk weight should be embedded with 3 order Legendre polynomials,and permanent environment with 2 order. Maximum error arose in 40 weeks,minimum error in 56 weeks. The direct genetic variance increased with the age. The estimate of genetic correlations between weeks was high above 0. 86. [Conclusions]Random regression model should be an effective method for estimation on the yolk weights. Yolk weights belonged to the median heritability trait.

关 键 词：遗传力 蛋黄质量 随机回归 遗传相关 

分 类 号：S831.2[农业科学—畜牧学]