母体遗传效应对青海细毛羊生产性能遗传参数估计的影响

doi:10.3724/SP.J.1005.2012.00584

遗传 ›› 2012, Vol. 34 ›› Issue (5): 584-590.doi: 10.3724/SP.J.1005.2012.00584

母体遗传效应对青海细毛羊生产性能遗传参数估计的影响

王鹏宇¹, 官却扎西², 祁全青², 德毛², 张文广¹, 李金泉¹

1. 内蒙古农业大学动物科学学院, 呼和浩特 010018 2. 青海省三角城种羊场, 西宁812300

收稿日期:2011-10-11 修回日期:2012-02-03 出版日期:2012-05-20 发布日期:2012-05-25
通讯作者: 李金泉 E-mail:lijinquan_nd@126.com
基金资助:
现代农业产业技术体系建设专项资金(编号：CARS-40-05)资助

Impact of maternal genetic effect on genetic parameter estimation of production traits for Qinghai fine-wool sheep

WANG Peng-Yu¹, GUANQUE Zha-Xi², QI Quan-Qing², DE Mao², ZHANG Wen-Guang¹, LI Jin-Quan¹

1. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China 2. San-jiao-cheng Sheep Breeding Farm in Qing-hai Province, Xining 812300, China

Received:2011-10-11 Revised:2012-02-03 Online:2012-05-20 Published:2012-05-25

摘要/Abstract

摘要： 为了研究母体遗传效应对青海细毛羊生长性状、产毛性状的影响, 文章采用平均信息最大约束似然法应用不同混合动物模型估计青海细毛羊生产性状的遗传参数, 并采用似然比检验对不同模型进行比较分析。各模型中均包括固定效应、个体直接加性遗传效应、残差效应; 随机效应为：个体永久环境效应、母体遗传效应、母体永久环境效应。不同模型对随机效应作了不同考虑：模型1不考虑个体永久环境效应、母体遗传效应、母体永久环境效应; 模型2考虑母体永久环境效应; 模型3考虑母体遗传效应; 模型4考虑母体遗传效应和母体永久环境效应; 模型5考虑个体永久环境效应和母体遗传效应; 模型6考虑个体永久环境效应、母体遗传效应、母体永久环境效应。各模型估计的初生重遗传力为：0.1896~0.3781; 断奶重遗传力为：0.2537~0.2890; 周岁重遗传力范围：0.2244~0.3225; 成年羊体重遗传力范围：0.2205~0.3983; 产毛量遗传力为：0.1218~0.1490; 羊毛细度遗传力为：0.0983~0.4802; 羊毛长度遗传力为：0.1170~0.1311。与模型1相比, 模型3对于初生重、断奶重差异显著(P<0.01), 对于周岁重、成年羊体重各模型与模型1的似然比检验差异不显著(P>0.05); 与模型6相比, 模型4、5对于羊毛细度差异显著(P<0.01), 模型4对羊毛长度差异显著(P<0.05), 对于产毛量各模型与模型6似然比检验差异不显著(P>0.05)。生长性状中初生重、断奶重受母体遗传效应影响显著, 周岁重、成年羊体重受母体遗传效应影响不显著; 产毛性状中羊毛细度、长度受母体遗传效应影响显著, 产毛量受母体遗传效应影响较弱。

关键词: 青海细毛羊, 母体遗传效应, 生长性状, 产毛性状, 遗传参数

Abstract: The maternal genetic effects on estimating genetic parameters for growth traits and wool traits of Qinghai fine-wool sheep were investigated.The genetic parameters for production traits of Qinghai fine-wool sheep were estimated by average information restricted maximum likelihood (AIREML) with different animal models, and the differences between different animal models were tested by likelihood ratio test. Fixed effects, direct genetic effects, and residual effects were included all models; and random effects were individual permanence environmental effects, maternal genetic effects, and maternal permanence environmental effects. The six models differ in the way of considering random effects: in model 1 individual permanence environmental effects, maternal genetic effects, and maternal permanence environmental effects were not contained; in model 2 maternal permanence environmental effects were included; in model 3 maternal genetic effects were included; in model 4 both maternal genetic effects and maternal permanence environmental effects were include; in model 5 both individual permanence environmental effects and maternal genetic effects were contained;in model 6 all random effects were contained. The direct heritabilities were 0.1896~0.3781, 0.2537~0.2890, 0.2244~0.3225, 0.2205~0.3983, 0.1218~0.1490, 0.0983~0.4802, and 0.1170~0.1311 for birth weight, weaning weight, yearling weight, hogget weight,greasy fleece weight, fiber diameter, and staple length,respectively. Compared with model 1, model 3 was-significant(P<0.01) for birth weight and weaning weight, other models were not significant (P>0.05)for Yearling weight, Hogget weight; and paralleled with model 6, both model 4 and model 5 were significant(P<0.01) for fiber diameter,model 4 was significant(P<0.05) for staple length, and other models were not signifi-cant(P>0.05) for greasy fleece weight by likelihood ratio test.The maternal effects were important determinants of estimated the genetic parameters for birth weight, weaning weigh, fiber diameter, and staple length, but were not significant for yearling weight, and hogget weight, and was slightly significant for greasy fleece weight.

Key words: Qinghai fine-wool sheep, maternal genetic effect, growth traits, wool traits, genetic parameters

王鹏宇，官却扎西，祁全青，德毛，张文广，李金泉. 母体遗传效应对青海细毛羊生产性能遗传参数估计的影响[J]. 遗传, 2012, 34(5): 584-590.

WANG Peng-Yu, GUANQUE Zha-Xi, QI Quan-Qing, DE Mao, ZHANG Wen-Guang, LI Jin-Quan. Impact of maternal genetic effect on genetic parameter estimation of production traits for Qinghai fine-wool sheep[J]. HEREDITAS, 2012, 34(5): 584-590.

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母体遗传效应对青海细毛羊生产性能遗传参数估计的影响

Impact of maternal genetic effect on genetic parameter estimation of production traits for Qinghai fine-wool sheep

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