EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO
Abd El-Salam, A., El-Daly, E., Y.A. Hamouda, Y., El-Safty, S., El-Attar, A. (2017). EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO. EKB Journal Management System, 25(2), 259-269. doi: 10.21608/ajs.2017.13579
A. Abd El-Salam; Eman F. El-Daly; Y. Y.A. Hamouda; S. A. El-Safty; A H. El-Attar. "EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO". EKB Journal Management System, 25, 2, 2017, 259-269. doi: 10.21608/ajs.2017.13579
Abd El-Salam, A., El-Daly, E., Y.A. Hamouda, Y., El-Safty, S., El-Attar, A. (2017). 'EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO', EKB Journal Management System, 25(2), pp. 259-269. doi: 10.21608/ajs.2017.13579
Abd El-Salam, A., El-Daly, E., Y.A. Hamouda, Y., El-Safty, S., El-Attar, A. EFFECT OF STRAIN, SEASON AND BREEDER'S AGE ON SOME PHYSIOLOGICAL PARAMETERS FOR LAYER DEAD EMBRYO. EKB Journal Management System, 2017; 25(2): 259-269. doi: 10.21608/ajs.2017.13579

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

Arab Universities Journal of Agricultural Sciences
Article 2, Volume 25, Issue 2, September 2017, Page 259-269  XML PDF (579.82 K)
DOI: 10.21608/ajs.2017.13579
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Authors
A. Abd El-Salam* 1; Eman F. El-Daly1; Y. Y.A. Hamouda1; S. A. El-Safty2; A H. El-Attar3
1Animal production Dept., National Research Center, Dokki, Egypt
2Poultry Production Dept. Faculty of Agriculture, Ain Shams University, Cairo, Egypt.
3Poultry Production Dept. Faculty of Agriculture, Ain Shams University, Cairo, Egypt
Abstract
The effect of breederʼs strain (Hy-line Brown and Hy-line White W36) flock aged (28, 36, 46, 55, 66 weeks of age) and breeding season on some physiological measurements in egg, demand organs, dead supply organs and lymphoid organs were examined. At each age, 10 unhatched eggs from each genotype were examined on embryo weight percentage, Chorioallotoic  weight %, albumen pH %, yolk pH %, residual yolk %, pectoral  muscles weight %, hatch muscles weight %, heart, liver, lunges, spleen, burse weight percentage. There was a significant difference between layer breeder genotypes for lunges weight percentage the brown was higher (0.84) than the white (0.62). The breeding season had a significant effect on heart, liver, lunges weight percentages in winter higher than summer but yolk pH and residual yolk the summer higher than the winter. Breeder's age significant effect on embryo weight percentage, Chorioallotoic weight %, albumen pH %, yolk pH%, residual yolk %, hatch muscles weight % heart, liver, lunges and burse weight percentage.  It could be observed that the genetic differences among layer breeder strain and age of breeders can affect the hatchery performance. Additionally, handling of hatching eggs and incubation management can play a major role to overcome numerous hatching problems. In turn, increasing the production of table eggs and achieves the balance between supply and demand of that strategic commodity in Egyptian market.
Keywords
Strain; season; Age; Demand organs; Supply organs and lymphoid organs
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