Exploration of Growth Curves for Recessive White Chicken and Qingyuan Patridge Chicken and Correlation Study

A local breed Qingyuan Patridge Chicken(Q PC) and an introduced breed from abroad Recessive White Chicken(R WC), were selected to create fit growth curves for body weight and tibia length by three modles, such as Logistic, Gompertz and Von Bertanlaffy, and the best models for body weght and tibia length were chosen respectively via comparing fitting effects of the three models.The main results were as follow : in the three models used for fitting growth curves, Gompertz and Von Bertalanffy model was better to fit growth curve of body weight, and Logistic mode was the best to fit growth curve of tibia length.Body weight of 2weeks was extremely significantly related to that of 3～14weeks, and r value was 0.8.Tibia length of 3weeks was also extremely significantly related to that of 3～14weeks, and r value was 0.8.It is concluded that sorting out chickens which have higher body weight and longer tibia length in early stage are more likely to have higher body weight when being sold in markets.