Genetic effects on growth and egg production traits in two-way crosses of Egyptian and commercial layer chickens

A crossbreeding experiment was conducted between the Sinai (SI), an indigenous Egyptian strain, and exotic Lohmann Brown (LB) breeds of chickens. total 790 chicks were produced in four genetic groups, namely SI x SI, LB LB, SI. The objective to estimate direct additive effect (gi), individual heterosis (hi), maternal (gm) for growth reproduction traits. Direct effects positive (P ≤0.01) bodyweight (BW) at 4, 8, 12 weeks old favour For egg production traits, gi age sexual maturity (ASM) which first 10 eggs (P10), but negative mean (MP10), number 90 days (EN90),mean (MEN90), mass (EM). estimates (%) high BW daily gain except BW0. Maternal weight significant <0.05) only hatching (BW0), 4 (BW4) from eight (DWG4-8). Thus, crossbreed favourable on chicks. As adapted should be regarded as a dam line crossing with has greater potential growth. Use sire strain conjunction would increase resulting hybrid