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Asian Journal of Animal and Veterinary Advances
  Year: 2015 | Volume: 10 | Issue: 10 | Page No.: 527-536
DOI: 10.3923/ajava.2015.527.536
 
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Phenotypic Characterization of Indian Naked Neck Chicken Under Tropical Climatic Conditions

M.V. Reddy, V. Chinni Preetam, A. Rajashekher Reddy, U. Raj Kumar, V. Ravinder Reddy, K. Gautham, D. Hareesh and P. Guru Vishnu

Abstract:
The three naked neck broiler genotypes (NaNa, Nana and nana) were investigated for the effect of temperature on juvenile body weights, shank length, immune competence and carcass characteristics. Weekly body weights were recorded from day old to six weeks (n = 417). The body weights were significantly higher in naked neck genotypes (NaNa and Nana) at 4th, 5th and 6th week of age. Birds with NaNa and Nana genotype recorded significantly (p≤0.05) higher weight gains during 4th (211.17 g) and 5th (207.96 g) week, respectively than nana genotype. The body weight gains were numerically higher at all ages either in NaNa or Nana genotypes without any significant difference. The shank length did not show any significant variation among the genotypes, which ranged from 78.54 mm in full feathered (nana) birds to 79.67 mm in heterozygous (Nana) population with an overall mean of 79.13 mm. Mean anti SRBC titre, anti NDV titre and response to PHA-P ranged from 3.55-5.6, 2.75-5.10 and 1.35-1.47 mm, respectively in different genetic groups. The dressing percentage was significantly higher in NaNa genotypes (71.96) than their normal (nana) siblings (69.66), which can be attributed to higher body weight and less losses due to lack of feathers in naked neck chicken. The liver, heart and gizzard weights are numerically higher in NaNa and Nana genotypes. The present study invariably concluded that Na gene in homozygous and heterozygous condition is more beneficial to exploit for better performance of Naked neck in tropical conditions.
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How to cite this article:

M.V. Reddy, V. Chinni Preetam, A. Rajashekher Reddy, U. Raj Kumar, V. Ravinder Reddy, K. Gautham, D. Hareesh and P. Guru Vishnu, 2015. Phenotypic Characterization of Indian Naked Neck Chicken Under Tropical Climatic Conditions. Asian Journal of Animal and Veterinary Advances, 10: 527-536.

DOI: 10.3923/ajava.2015.527.536

URL: https://scialert.net/abstract/?doi=ajava.2015.527.536

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