Comparison of predicted with actual body weight selection gains of Coturnix coturnix japonica

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Abstract
Results of nine generations of individual selection for six-week large and small body weight of Japanese quail (Coturnix coturnix japonica) are reported. The objectives of this study were three-fold: 1) To estimate genetic variation of body weight of Coturnix quail at six weeks; 2) To predict selection gains when selecting on an individual basis for large and small body weight; and 3) To conduct a selection program for large and small females and males, respectively, with greater response in the positive direction. Generally the actual gain was predicted more accurately in the females than in the males.