EFFECTS OF FEED RESTRICTION ON GROWTH AND REPRODUCTION IN RANDOM-BREDAND SELECTED LINES OF JAPANESE-QUAIL

Feed restriction (70% of ad libitum consumption) was carried out from 1 d after hatching until 44 d in a randombred quail line and until 28 d in a quail line selected for high 4-wk BW. Body weights of restricte d quail were significantly lower than ad libitum controls during restr iction. Two weeks after restriction ended, however, BW were no longer different. Mortalities were twice as high under restriction. Hatchabil ity of eggs was not affected by restriction, but restricted quail of t he selected line laid fewer double-yolk eggs than ad libitum controls.