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.