Estimations of genetic parameters of main specialized lines in Wens

The genetic parameters are important genetic characteristics for livestock. The estimation of genetic parameter is a basis for livestock genetic evaluation. The data of main growth and reproduction traits of each line bred by Wens Group from 2005 to 2014 were collected. The genetic parameters were estimated using the maximum likelihood method, the multiple-trait linear model and DMU software. The results showed that the heritability for growth traits ranged from 0.3 to 0.6, belonging to medium or high heritability. Among them, the heritability of BFT₁₀₀ was the highest above 0.4. There were high positive, high negative and weak negative genetic correlations between DAY₁₀₀ and DAY₃₀, ADG_30-100 and BFT₁₀₀, respectively. The heritability of reproduction traits was low, about 0.1. The heritage of LWB was the highest from 0.12 to 0.18 among reproduction traits. The genetic correlation between TNB and ANB was above 0.90, and the genetic correlation between TNB and HNB was above 0.7.