Research was conducted to study the effect of selection on generation, age and sex for body weight, body dimension, carcass trait and their realized heritability (h2) in Japanese quail with foundation stock of about 784 (364 males and 672 females) quails. Data obtained were subjected to analyses of variance and realized heritability calculated as appropriate for the following: live body weight and carcass traits in generation of Japanese quail as influence by sex and age, carcass weight and some edible and Inedible traits of Japanese quail, live body dimensions of Japanese quail as Influenced by sex, generation and age, realized heritability for body weight, carcass and some Inedible traits,
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