用不同模型估计绒山羊早期生长性状遗传参数的比较  

Comparison of Different Models for Estimating Genetic Parameters of Early Growth Traits in Cashmere Goat

作　　者：白俊艳[1] 李金泉[1] 道尔吉[1] 张勤[2] 

机构地区：[1]内蒙古农业大学动物科学与医学学院,呼和浩特010018 [2]中国农业大学动物科学技术学院,北京100094

出　　处：《Acta Genetica Sinica》2004年第6期578-581,共4页

基　　金：内蒙古自治区科委重大项目 (编号 :970 113 );内蒙古自治区教委重点项目 (编号 :980 0 48)资助~~

摘　　要：利用内蒙古伊盟阿尔巴斯白绒山羊种羊场从 1993年至 2 0 0 0年间白绒山羊的早期生长性状 (包括出生重、断乳重、日增重和周岁重 )的场内测定数据 ,对 4种不同动物模型估计遗传参数的差异进行了比较分析。不同模型中对母体遗传效应和母体环境效应作了不同的考虑 :模型Ⅰ ,不考虑母体遗传效应和母体环境效应 ;模型Ⅱ ,仅考虑母体遗传效应 ;模型Ⅲ ,仅考虑母体环境效应 ;模型Ⅳ ,同时考虑母体遗传效应和母体环境效应。利用MTDFREML程序采用非求导约束最大似然法 (DFREML)估计各模型中的方差组分 ,用似然比检验对不同模型的差异进行检验。结果表明 :对于出生重 ,母体遗传效应和母体环境效应都有极显著的影响 ,应采用模型Ⅳ进行分析 ;对于断乳重和日增重 ,母体遗传效应的影响不显著 ,而母体环境效应的影响极显著 ,应采用模型Ⅲ进行分析 ;对于周岁重 ,母体环境效应的影响不显著 ,而母体遗传效应的影响显著 ,应采用模型Ⅱ进行分析。Using data on early growth traits (including birth weight,weaning weight,daily gain,and yearling weight) of cashmere goat from the Aerbasi White Cashmere Goat Breeding Farm in Inner Mongolia,four different animal models for estimating genetic parameters were compared.The four models differ in the way of handling maternal genetic effect and maternal environmental effect:in model Ⅰ both maternal genetic and environmental effect were excluded,in model Ⅱ only maternal genetic effect was included,in model Ⅲ only maternal environmental effect was included,and in model Ⅳ both maternal genetic and environmental effect were included.The variance components under different models were estimated with derivative-free restricted maximum likelihood (DFREML) method using the MTDFREML program.The differences between different models were tested by likelihood ratio test.The results show that both maternal genetic and environmental effect have highly significant effect on birth weight.For weaning weight and daily gain the maternal genetic effect is not significant while the maternal environmental effect is highly significant; for yearling weight the maternal genetic effect is significant while the maternal environmental effect is not.

关 键 词：绒山羊 早期生长性状 动物模型 母体效应 

分 类 号：S8272[农业科学—畜牧学]