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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2013 > Volume 12 Number 9 > Ken Ohara, Masahiro Takayama, Tatsuhiko Goto, Sayed A.M. Osman and Masaoki Tsudzuki

Comparison of Growth in Three Varieties of the Japanese Extremely Long-Tailed Chicken Breed (Tosa-no-Onagadori)

Ken Ohara, Masahiro Takayama, Tatsuhiko Goto, Sayed A.M. Osman and Masaoki Tsudzuki
Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima-739-8528, Japan 1 College of Agriculture, Ibaraki University, Ami-300-0393, Japan 2 Japanese Avian Bioresource Project Research Center, Hiroshima University, 3 Higashi-Hiroshima-739-8528, Japan Department of Genetics, Faculty of Agriculture, Minia University, El Minia-61517, Egypt
Abstract :

The aim of this study is to reveal whether there are differences in live body weights and growth curves based on Gompertz function among three plumage color varieties (black-breasted white, black-breasted red and white) of the Japanese extremely long-tailed chicken breed (Tosa-no-Onagadori, briefly Onagadori), Special National Natural Treasure of Japan. Body weights were recorded every week from hatching to 30 weeks of age. In males, black-breasted red showed higher values than black-breasted white from 13 to 30 weeks of age. In females, black-breasted red was also higher than black-breasted white in body weights at 17, 19 and 26 to 30 weeks of age. Comparing the earliness of inflection points in growth curves among three varieties, the order was black-breasted white>black-breasted red>white in the female and black-breasted red>black-breasted white>white in the male. The differences in the body weights and inflection points are thought to be due to the genetic background differences between varieties. The information from this study will be useful in developing future strategies for conservation and improvement of the Onagadori as valuable genetic resource.

Keywords :
Body weight, growth curve, native Japanese chickens, Onagadori, plumage color varieties

Date Deposited : 19 Mar 2015 10:07

Last Modified : 19 Mar 2015 10:07

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Volume 12, Number 9, - 2013 , ISSN 1682-8356

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