EUROPEAN POULTRY SCIENCE, cilt.81, 2017 (SCI-Expanded)
Most of the selection studies in Japanese quail have focused on high body weight or short-term egg production. The effect of selection on long-term egg production is not well known. Japanese quail lines were subjected to phenotypic mass selection in different ways over 11 generations and a control group was reproduced by random mating. A high body weight line (HL), a low body weight line (LL) (based on 5-week body weight), a line (L) subjected to selection for egg production (120 day) and a control line (C) were used. Age at sexual maturity, egg weight, total number of eggs for 45 weeks and body weight of the lines were determined. A nonlinear regression analysis using the Grossman egg production function was used for the comparison of egg productions of the flocks.