Estimating the Growth Regularity and Genetic Parameters about Early Bodyweight of Huainan Partridge Duck with Different Growth Model

Growth and development regularity and genetic parameters of the Huainan partridge duck were analyzed.The average week bodyweight and week-old ( 1 to 9 week-old ) was fit with three non-lineared growth models, Gompertz model, Richards model and Logistic mode1.The results showed that the growth process of Huainan partridge duck could be demonstrated very well by three models, and all indexes of fitness were very high (more than 0.99).But Logistic model was the best model because of its less bias of feed practice, and its genetic parameters of limited bodyweight, adjustable parameter and coefficient of growth were 2 304.92 g, 13.11 and 0.46 respectively.The inflection age of growth was 3.35 weeks, and bodyweight at inflection age was 847.93 g.