Effect of the Line and Age of Female Broiler Breeder on Hatchability Performance of Eggs

An experiment was conducted to assess how hatchability performance of eggs is affected by line and age female broiler breeders. Response variables analyzed were hatchability, infertility, pipping (i.e., pipped shell but not emerged), embryonic mortality (1st, 2nd, 3rd wk), malposition. The trials involved a total 2,880 fertile from two breeder lines (Ross 308 Cobb 500) at different ages (30 50 wk). A 2 x factorial design used, where the main effects. in Ross higher than 500 line, its infertility line. Hatchability interaction (50 wk hen line) less, their higher. Embryonic mortality, pipping, malposition did present differences for between factors. results suggest that can be improved, if egg management incubation procedures are adjusted account age.