Effect of the naked neck gene on carcase composition and immunocompetence in chicken

1. An experiment was conducted to study the effect of naked neck gene (Na) on carcase measurements and some immunological responses of chickens. 2. The presence of naked neck gene in a single or double state increased body weight. 3. The naked neck genotypes (NaNa or Nana) exhibited higher relative...

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Bibliographic Details
Published in:British poultry science 2008-03, Vol.49 (2), p.103-110
Main Authors: Fathi, M.M, El-Attar, A.H, Ali, U.M, Nazmi, A
Format: Article
Language:English
Subjects:
abdominal fat
Adipose Tissue
Animals
Antibody Formation - genetics
Body Composition - genetics
Body Weight
breast muscle
carcass composition
Cell Differentiation - genetics
cell-mediated immunity
chickens
Chickens - genetics
dressing percentage
Erythrocytes - immunology
Feathers - anatomy & histology
Female
genotype
heterophils
heterozygosity
Heterozygote
homozygosity
Homozygote
Immunity, Cellular - genetics
immunocompetence
Immunocompetence - genetics
Leukocytes - cytology
lymphocytes
Lymphoid Tissue - anatomy & histology
Male
Meat
naked neck gene
Organ Size - genetics
Sheep
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Summary:1. An experiment was conducted to study the effect of naked neck gene (Na) on carcase measurements and some immunological responses of chickens. 2. The presence of naked neck gene in a single or double state increased body weight. 3. The naked neck genotypes (NaNa or Nana) exhibited higher relative weight of dressed carcase, drumstick and breast muscles compared to normally feathered individuals (nana). The proportion of abdominal fat was decreased in both naked neck genotypes compared with normally feathered ones. 4. A higher (non-specific) cell-mediated immune response was evoked in Na gene bearing birds. 5. Higher concentrations of antibodies occurred after injection of sheep red blood cells into naked neck birds, particularly at 14 d post-secondary injection. 6. The NaNa birds had a higher heterophil/lymphocyte ratio than Nana and nana siblings.
ISSN:0007-1668
1466-1799
DOI:10.1080/00071660802005137