非遗传因素对敖汉细毛羊12个性状表现的影响

对内蒙古敖汉细毛羊主要性状的非遗传因素进行了分析,采用动物模型最佳线性无偏预测(BLUP)和多性状非求导约束最大似然法(MTDFREML)估计了12个主要性状的方差组分和遗传参数。结果表明:出生年份或性状鉴定年份对所有性状有显著影响;性别和场别对所有早期性状有显著影响,场别还对产毛性状中的剪毛量、体重和毛长度有显著影响;出生类型对所有产毛性状无显著影响,但对早期性状中的初生重、断乳重、断乳毛长度和断乳毛细度有显著影响;母亲年龄对初生重和断乳重有显著影响,对其余性状无显著影响;年龄对毛密度分和毛油汗分无显著影响,对其余产毛性状有显著影响。

Effects of Non-genetic Factors on the Traits of Inner Mongolian Aohan Merino Sheep

In this study,the effects of non-genetic factors on the main traits of Inner Mongolian Aohan Merino Sheep were investigated.Variance components and genetic parameters of twelve traits were analyzed by using animal model Best Linear Unbiased Prediction(BLUP) and Multiple Trait Derivative-Free Restricted Maximum Likelihood(MTDFREML).The results showed that the herd and birth year or measurement year of traits almost had significant effect on all traits.Sex and threshing ground had significant effect on all the early traits and threshing ground had significant effect on shearing amount,body weight and length of wool among wool characters.Birth type significantly affected the birth weight,weaning weight,weaning length of wool and weaning slander degree of wool among all the early traits,excepting all characters of producing wool.AGD only significantly affected birth weight and weaning litter weight while age had signi-ficant effect on all the wool traits except wool density score and wool oil score.