عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this study traits of body weight in different ages and effect of selection on breeding value at 42 days were investigated in three strains of Japanese quail for two generation. In the first generation 51 male and 51 female of each strain were randomly selected from the base population and one male with one female were located in each cage. Body weight (BW) of the progeny was measured at 14, 28, 42 and 49 days of age. For the second generation in White, Canadian Wild and Brown strains a number of 30, 40 and 35 pairs of male and female birds that have the highest BV were selected. Mean differential of breeding value in two generations for male and female in White strain were 10.7 and 10.2 gr, in Canadian wild strain were 8.6 and five gr and in Brown strain were four and 9.1 gr, respectively. Heritability of BW at 14, 28 and 42 days for White strain was 0.37, 0.26, 0.74, Canadian wild strain was 0.21, 0.17 and 0.44 and for Brown strain were 0.39, 0.45 and 0.52, respectively.