Authors : Tatsuhiko Goto, Naoki Goto, Jun-ichi Shiraishi, Takashi Bungo and Masaoki Tsudzuki
Abstract: The objective of this study was to compare the growth curve parameters for body weight of Japanese native chickens (Onaga-dori, Tosa-jidori, Ukokkei and Hinai-dori) using a non-linear model, Gompertz function. The data were collected from the four indigenous breeds together with two foreign breeds (White Plymouth Rock and Brown Leghorn) that were reared from 0 day old to 20 weeks of age. Breed differences were observed in the growth parameters. The predicted mature weight of the Hinai-dori was heavier than the other three Japanese native breeds. Tosa-jidori was observed to be late maturing and lighter at maturity, while Ukokkei was shown to have a higher growth rate. The development of growth curves for indigenous breeds may be useful in selecting native Japanese chickens that have rapid growth at early ages.
Tatsuhiko Goto, Naoki Goto, Jun-ichi Shiraishi, Takashi Bungo and Masaoki Tsudzuki, 2010. Comparison of Growth Curves of Four Breeds of Japanese Native Chicken, Onaga-Dori, Tosa-Jidori, Ukokkei and Hinai-Dori. Journal of Animal and Veterinary Advances, 9: 1362-1365.