Khalifa, N. (2022). EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS. Egyptian Poultry Science Journal, 42(3), 373-383. doi: 10.21608/epsj.2022.266622
Nouran Mohsen Khalifa. "EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS". Egyptian Poultry Science Journal, 42, 3, 2022, 373-383. doi: 10.21608/epsj.2022.266622
Khalifa, N. (2022). 'EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS', Egyptian Poultry Science Journal, 42(3), pp. 373-383. doi: 10.21608/epsj.2022.266622
Khalifa, N. EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS. Egyptian Poultry Science Journal, 2022; 42(3): 373-383. doi: 10.21608/epsj.2022.266622
EFFECT OF GENETICALLY IMPROVED ON PHYSIOLOGICAL, IMMUNE RESPONSE AND PRODUCTIVE PERFORMANCE IN NATIVE CHICKENS
Poultry Production, Faculty of Agriculture, Cairo University, Giza
Abstract
The present study evaluated to assess genetic variability in performance traits, Blood Parameters and immune competence by using biotechnological methods on two Egyptian broiler lines Cairo-B2 and Random breed control (RBC). A total of two thousand chicks, from the ninth generation from lines, were reared in four replicated rooms under the same conditions until 8 weeks of age. Live body weight was determined weekly for Cairo-B2 and Random breed control (RBC) until 8 weeks, Blood samples were collected at 4 weeks of age from 20 chicks from each line to determined Triiodothyronine(T3), thyroxine (T4), total protein (TP), total lipids (TL), hematocrit (Ht), and Insulin-like Growth Factor-1 (IGF-1), The primary immune response of 30 chicks per line to Sheep red blood cells (SRBC) antigens was injected at 4 weeks and repeated at 6 weeks of age. 40 chicks from each line were slaughtered to determined carcass characteristics, the Cairo-B2 line had significantly higher than RBC line in body weight, carcass, breast meat, neck and wings weights. The results were the RBC line had significantly higher T3 and IGF-1 than the Cairo-B2 line and there was no significant difference in T4, TP, TL and Ht between the lines. The RBC line had higher antibodies titers to SRBC than the Cairo-B2 line that was shown in each injection. We are concluded that selection for high body weight over many generations can negatively effect on the immune response and carcass weight.
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