EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO

摘要: The effect of breederʼs strain (Hy-line Brown and Hy-line White W36) flock aged (28, 36, 46, 55, 66 weeks age) breeding season on some physiological measurements in egg, demand organs, dead supply organs lymphoid were examined. At each age, 10 unhatched eggs from genotype examined embryo weight percentage, Chorioallotoic  %, albumen pH yolk residual pectoral  muscles hatch heart, liver, lunges, spleen, burse percentage. There was a significant difference between layer breeder genotypes for lunges percentage the brown higher (0.84) than white (0.62). had percentages winter summer but winter. Breeder's age Chorioallotoic pH%, % percentage.  It could be observed that genetic differences among breeders can affect hatchery performance. Additionally, handling hatching incubation management play major role to overcome numerous problems. In turn, increasing production table achieves balance strategic commodity Egyptian market.