应用贝叶斯算法评估如皋黄鸡40周龄体重母体遗传、显性遗传效应

摘要

The main purpose of the present paper is to evaluate the influence of the maternal genetic and dominant effects on the phenotypic variances of body weight at 40 weeks in Rugao Yel ow chicken. The data were col ected from Rugao Yel ow Chicken for sequenced four generations from 2009 to 2011. A total of 3 890 recorders from laying hen were evaluated. Direct genetic, maternal genetic and dominant genetic effects were embedded to the mixed models. The recorders at different day-olds were standardized to 280 d body weights. Models were compared using DIC values. The results suggested: genetic model on 280 d body weight should include direct and maternal genetic effects; the heritability of 280 d body weight was 0.45, maternal genetic effect counted for 6 percent of phenotypic variances. The heritability for the body weight at 40 weeks were moderate. In the future, individual breeding values that should be better to include the maternal genetic effect would be useful in specific selection on Rugao Yel ow Chicken.%文章旨在评估亲本印记及显性遗传效应对如皋黄鸡40周龄体重表型方差的影响。收集2009~2011年如皋黄鸡生产记录，包括3890只鸡的产蛋高峰期体重记录，以贝叶斯算法分析表型方差组分。应用动物模型时考虑加性遗传、母体遗传以及显性遗传效应，对不同日龄体重进行标准化，以DIC值选择最优模型。结果表明，如皋黄鸡40周龄体重性状遗传模型应考虑加性遗传效应和母体遗传效应；如皋黄鸡40周龄遗传力为0.45，母体遗传效应可解释6%表型方差；如皋黄鸡40周龄体重基本不受显性遗传效应影响。遗传分析结果显示40周龄体重属于中等遗传力性状，可以利用母体遗传效应估计育种值进行专门化选育。