›› 2018, Vol. 45 ›› Issue (11): 3062-3069.doi: 10.16431/j.cnki.1671-7236.2018.11.011

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Fitting and Comparative Analysis of Growth Curves in Danzhou Chicken with Different Plumage Colors

LI Yishu, HOU Guanyu, ZHOU Xiong, SHI Liguang, ZHOU Hanlin, CAO Ting   

  1. Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
  • Received:2018-03-30 Online:2018-11-20 Published:2018-11-20

Abstract:

In order to explore the growth profiles and growth rates of Danzhou chicken at different stages,three nonlinear analysis models (Gompertz,Logistic and Bertalanffy) were employed to fit and analyze the body weight growth curves of Danzhou chickens with black and mahua colors feather at the age of 0 to 18 weeks.200 Danzhou chickens with black feather (100 males and 100 females) and 200 Danzhou chickens with mahua colors feather (100 males and 100 females) were selected and weighed at 0,2,4,6,8,10,12,14,16 and 18 weeks of age,and the body weight growth curves were fitted and analyzed by Gompertz,Logistic and Bertalanffy models,respectively.The results showed that the growth curve of Danzhou chickens demonstrated a "S" shape,consistent with normal growth and development.The measured body weights of female Danzhou chickens during 0 to 18 weeks and male Danzhou chickens during 0 to 16 weeks showed no significant difference (P>0.05),and that of male Danzhou chickens with mahua colors feather were significantly higher than that with black feather at 16 to 18 weeks (P<0.05).The growth curves predicted by three nonlinear models all fitted well with the measured body weight curves of Danzhou chickens with black and mahua colors feather (R2>0.992),and the prediction curve of the model was basically consistent with the actual observation curve.the Gompertz model fitted better than Logistic or Bertalanffy models,and it fitted better in female chickens than male chickens.In summary,the present study revealled the growth profiles and growth rates of Danzhou chicken at different stages,which may provide scientific support for optimizing breeding production and industrialization of Danzhou chicken.

Key words: Danzhou chicken; growth curve; Gompertz model; Logistic model; Bertalanffy model

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