A Growth Performance and Nonlinear Growth Curve Functions of Large- and Normal-Sized Japanese Quail (Coturnix japonica)

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  • Haqani Mohammad I.
    Graduate School of Biosphere Science, Hiroshima University
  • Kawamura Kensuke
    Japan International Research Center for Agricultural Sciences
  • Takenouchi Atsushi
    Graduate School of Integrated Sciences for Life, Hiroshima University Japanese Avian Bioresource Project Research Center, Hiroshima University
  • Kabir Mohammad H.
    Graduate School of Biosphere Science, Hiroshima University
  • Nakamura Yoshiaki
    Graduate School of Biosphere Science, Hiroshima University Graduate School of Integrated Sciences for Life, Hiroshima University Japanese Avian Bioresource Project Research Center, Hiroshima University
  • Ishikawa Akira
    Japanese Avian Bioresource Project Research Center, Hiroshima University Graduate School of Bioagricultural Sciences, Nagoya University
  • Tsudzuki Masaoki
    Graduate School of Biosphere Science, Hiroshima University Graduate School of Integrated Sciences for Life, Hiroshima University Japanese Avian Bioresource Project Research Center, Hiroshima University

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  • A Growth Performance and Nonlinear Growth Curve Functions of Large- and Normal-Sized Japanese Quail (<i>Coturnix japonica</i>)

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<p>This study aimed to evaluate the differences between the growth patterns of large- and normal-sized Japanese quail strains and their F1 progeny, by fitting their growth parameter values to five nonlinear regression growth models (Weibull, Logistic, Gompertz, Richards, and Brody). The Richards model presented the best fit for both sexes of the large-sized quail strain, whereas the Gompertz model presented the best fit for both sexes of the normal-sized quail strain, based on goodness-of-fit criteria (higher adjusted R2 and lower Akaike and Bayesian information criteria). Both sexes of F1 birds derived from the cross between normal-sized females and large-sized males were best fitted by the Richards model. In contrast, growth parameters of the F1 birds derived from the cross between large-sized females and normal-sized males were best fitted to the Gompertz model. The data could be fitted nearly as well to the Weibull and Logistic models as to the Richards and Gompertz models. The Brody model presented the poorest fit for the growth parameter values. The results indicated that the Richards and Gompertz models could best describe the growth characteristics of both large- and normal-sized quails. Moreover, the observed growth pattern of the F1 birds was likely inherited from the male parental strain. To the best of our knowledge, this is the first study comparing the growth curves of the reciprocal F1 generations with their parental strains in quails.</p>

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