›› 2019, Vol. 46 ›› Issue (7): 2053-2058.doi: 10.16431/j.cnki.1671-7236.2019.07.021

• Genetics and Breeding • Previous Articles     Next Articles

Study on Growth Curve Fitting of Slow-feathering Line of Guizhou Yellow Chickens

LI Honglin1, LI Wei2, RAO Yongchao1, MU Tenghui1, YANG Defeng1, JIAN Huafeng1, LIN Jiadong1, ZHANG Fuping1   

  1. 1. Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau and Mountainous Region, Ministry of Education, College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. Guizhou Management Station of Livestock Genetic Resources, Guiyang 550001, China
  • Received:2018-12-20 Online:2019-07-20 Published:2019-07-22

Abstract:

The aim of this study was to reveal the growth and development law of the slow-feathering line of Guizhou Yellow chicken.100 chickens (50 males and 50 females) were selected randomly,and were weighed at the end of 0,2,4,6,8,10,12 and 14 weeks old.Three nonlinear growth curve models of Bertalanfy,Logistic and Gomperta were used in this experiment,and the body weight changes of Yellow chicken slow-feathering line at 0-14 weeks were analyzed by fitting.The results showed that the three models could all well fit the growth curve of Yellow chicken,and the R2 were all above 0.99.Logistic model fitted the growth curve of both cock and hen best,and the fitting results were nearest to the measured values.The inflexion age was 10.42 weeks old,the inflexion weight was 1 550.81 g in the male,and the inflexion age was 9.14 weeks old,the inflexion weight was 976.67 g in the female.The results preliminarily revealed the growth and development regularity of slow-feathering line of Guizhou Yellow chickens,which could provide a scientific basis for breeding,production and industrialization development of slow-feathering line of Guizhou Yellow chickens.

Key words: Guizhou Yellow chickens; body weight; growth curve; fitting

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