Desempenho de codornas de corte oriundas de diferentes classes de idades da matriz e de peso dos ovos

The effects of breeder ages versus egg weight interaction on performance traits of European quail (Coturnix coturnix coturnix) at 21 and 42 days of age were studied in a completely randomized experimental design with 9 treatments, 5 replicates and 15 quails per experimental unit. The treatments consisted of a 3x3 factorial combination, three breeder ages (beginning at 70, 205 and 280 days of age) and three egg weight categories (category 1 - from 11.0 to 12.9g; category 2 - from 13.0 to 14.9g and category 3 - from 15.0 to 16.9g). The quails were fed a unique experimental diet containing 28% crude protein and 2900kcal of metabolizable energy. The following performance traits were recorded: body weight (g), weight gain (g), feed intake (g) and feed intake: weight gain ratio (g/g) at 21 and 42 days of age. No significant interaction effects between breeder age and egg weight categories were observed for all performance traits. Quails from heavier egg weight categories and breeder ages beginning at 205 and 280 days of age showed higher performance. No effects of egg weight categories on performance traits at 42 days of age were observed. Heavier egg weight categories resulted in a heavier quail at hatch.