Influence of naked neck gene on growth performance and immune response in chicken
Nazmi, A.
Influence of naked neck gene on growth performance and immune response in chicken [electronic resouce]. تأثير العامل الوراثي المسئول عن عرى الرقبة علي النمو والاستجابة المناعية في الدجاج. - p.105- 121.
Includes references.
An experiment was undertaken to evaluate the effect of naked neck (Na) gene in a single or double state on the growth performance and immune response in chickens. Two hundred and twenty (NaNa, Nana and nana) one day old chicks were used. They were reared under similar environmental, managerial and hygienic conditions from hatching to 16 weeks of age. The high and low ambient temperatures recorded during the whole experiment were 27 and 23C, respectively. The current results revealed that the Nana genotype had significantly heavier body weight compared to nana one. However, there were no significant differences between NaNa and nana genotypes for body weight. Also, The Nana genotype consumed more feed compared to nana and NaNa genotypes. The presence of Na gene in a single or double state significantly improved feed conversion ratio compared to nana sibs. With respect to cutaneous basophil hypersensitivity (CBH) response, the NaNa genotype significantly increased toe-web swelling at 48 and 72 hrs after PHA-P injection compared to Nana and nana genotypes. There were no significant differences among genotypes for relative weight of both spleen and thymus. However, the Nana genotype significantly increased relative bursa weight compared to both NaNa and nana genotypes. Also, the Nana genotype significantly increased hematocrit level compared to nana and NaNa genotypes. There was no significant difference among genotypes for plasma total protein, albumen, globulin and relative weight of both gizzard and liver. Concerning the phagocytic activity, the Nana genotype had significantly lower levels of carbon in their circulation as compared to nana genotype. Opposite trend was noticed for NaNa genotype. There was positive relationship between plasma globulin and body weight was observed in Nana genotype, but inverse and low relationships were showed in both NaNa and nana genotypes. Negatively relationship between body weight and toe-web swelling measured at all times after PHA P injection was observed in NaNa genotype. Opposite trend was observed in nana genotype. There was positive correlation between relative spleen weight and relative thymus weight was observed in both NaNa and Nana genotypes. Similar trend, but very low was observed in nana genotype. The relative bursa weight was negatively correlated with toe-web swelling for all genotypes at all times. There was highly significant positive relationship between toe-web swelling measured at 48h post PHA-P injection and toeweb swelling measured at 72h post PHA-P injection was observed in all genotypes.
Summary in Arabic.
Chickens--Genetics.
Chickens--Immunology.
Chickens--Immunology--Genetic aspects.
Influence of naked neck gene on growth performance and immune response in chicken [electronic resouce]. تأثير العامل الوراثي المسئول عن عرى الرقبة علي النمو والاستجابة المناعية في الدجاج. - p.105- 121.
Includes references.
An experiment was undertaken to evaluate the effect of naked neck (Na) gene in a single or double state on the growth performance and immune response in chickens. Two hundred and twenty (NaNa, Nana and nana) one day old chicks were used. They were reared under similar environmental, managerial and hygienic conditions from hatching to 16 weeks of age. The high and low ambient temperatures recorded during the whole experiment were 27 and 23C, respectively. The current results revealed that the Nana genotype had significantly heavier body weight compared to nana one. However, there were no significant differences between NaNa and nana genotypes for body weight. Also, The Nana genotype consumed more feed compared to nana and NaNa genotypes. The presence of Na gene in a single or double state significantly improved feed conversion ratio compared to nana sibs. With respect to cutaneous basophil hypersensitivity (CBH) response, the NaNa genotype significantly increased toe-web swelling at 48 and 72 hrs after PHA-P injection compared to Nana and nana genotypes. There were no significant differences among genotypes for relative weight of both spleen and thymus. However, the Nana genotype significantly increased relative bursa weight compared to both NaNa and nana genotypes. Also, the Nana genotype significantly increased hematocrit level compared to nana and NaNa genotypes. There was no significant difference among genotypes for plasma total protein, albumen, globulin and relative weight of both gizzard and liver. Concerning the phagocytic activity, the Nana genotype had significantly lower levels of carbon in their circulation as compared to nana genotype. Opposite trend was noticed for NaNa genotype. There was positive relationship between plasma globulin and body weight was observed in Nana genotype, but inverse and low relationships were showed in both NaNa and nana genotypes. Negatively relationship between body weight and toe-web swelling measured at all times after PHA P injection was observed in NaNa genotype. Opposite trend was observed in nana genotype. There was positive correlation between relative spleen weight and relative thymus weight was observed in both NaNa and Nana genotypes. Similar trend, but very low was observed in nana genotype. The relative bursa weight was negatively correlated with toe-web swelling for all genotypes at all times. There was highly significant positive relationship between toe-web swelling measured at 48h post PHA-P injection and toeweb swelling measured at 72h post PHA-P injection was observed in all genotypes.
Summary in Arabic.
Chickens--Genetics.
Chickens--Immunology.
Chickens--Immunology--Genetic aspects.