Morphological characterization of indigenous chickens of Sikkim and West Bengal, India

The study was conducted to characterize the variations in physical characters and some important feather and skin mutations observed in different populations of native chickens of West Bengal and Sikkim, India. The data encompassing eight different phenotypes such as, naked neck chicken, frizzled chicken, muffed/bearded chicken, creeper chicken, crested chicken, rumpless chicken, feathered shank chicken and fibromelanosis chicken, were collected from six districts of West Bengal and two districts of Sikkim. Seven qualitative traits such as colour of the egg shell, feather, skin, shank, comb and earlobe as well as the type of feather, and three quantitative traits such as shank length, egg weight and body weight, were assessed in a total of 2 170 fowls of both sexes. The data were analysed statistically using descriptive statistics, the differences in means were compared using Duncan's multiple range test and ?2 was used for non-parametric characters. Each of the populations had multiple variants and mixed feather colours were seen in most of the chickens while the feather, skin and shank colours were all black in fibromelanosis chickens. The shank colour was predominantly blue, followed by yellow and white. The skin colour in most of the chickens was white. Most of the chickens had a single comb (except for the crested chicken). The highest body weight was observed in the desi chicken while the rumpless chicken weighed the least. The egg-shell colour varied between cream and light brown in all the flocks except for the fibromelanosis chicken whose egg-shell colour was tinted bluish. The highest recorded egg weight was observed in the naked neck chicken, whereas the hatchability and egg weight were the lowest for the rumpless chicken. In the recent years, it has been observed that there is a significant reduction in the population of native chickens. This may be attributed to the restocking with Rhode Island Red and synthetic Kruilor chickens following the avian influenza outbreaks in the region. Hence, immediate steps need to be taken to preserve whatever is left in the native chicken ecotypes in the region.

[1]  T. K. Bhattacharya,et al.  Estimation of genetic heterogeneity of chicken germplasm being used for development of rural varieties utilizing DNA markers , 2013, Journal of Genetics.

[2]  Y. Akter,et al.  GEOGRAPHICAL DISTRIBUTION, CLASSIFICATION, CHARACTERIZATION AND CONSERVATION OF DIFFERENT NATIVE CHICKEN VARIETIES OF BANGLADESH , 2011 .

[3]  U. K. Oke.  Influence of some major genes on early lay traits of crossbred local pullets in a humid tropical environment. , 2011 .

[4]  M. S. Islam,et al.  Phenotypic characterization of Native Chicken reared under intensive management system , 2010 .

[5]  H. Simianer,et al.  The effect of frizzle gene and dwarf gene on reproductive performance of broiler breeder dams under high and normal ambient temperatures. , 2010, Poultry science.

[6]  T. Dessie,et al.  Morphological features of indigenous chicken populations of Ethiopia , 2010 .

[7]  B. Sutherland,et al.  Egg production potentials of certain indigenous chicken breeds from South Africa , 2010 .

[8]  A. Kangrang,et al.  Silk-Cloth Weaving Development of the Mon-Khmer Ethnic Group in Lower-Isan , 2010 .

[9]  T. K. Bhattacharya,et al.  Effect of Genotype and Age on Egg Quality Traits in Naked Neck Chicken under Tropical Climate from India , 2009 .

[10]  J. R. Subba.  Mythology of the People of Sikkim , 2009 .

[11]  M. Okpeku,et al.  Principal Components as Measures of Size and Shape in Nigerian Indigenous Chickens , 2009 .

[12]  Kehua Wang,et al.  Genetic variation of indigenous chicken breeds in China and a Recessive White breed using AFLP fingerprinting , 2008 .

[13]  F. Neser,et al.  Phenotypic variation of native chicken populations in northwest Ethiopia , 2007, Tropical Animal Health and Production.

[14]  S. Arabia,et al.  A Survey Study on the Distribution of Saudi Baladi Chickens and Their Characteristics , 2007 .

[15]  B. Rischkowsky.  The state of the world's animal genetic resources for food and agriculture , 2007 .

[16]  A. H. Asgedom.  Village poultry in Ethiopia : socio-technical analysis and learning with farmers , 2007 .

[17]  R. Pym,et al.  The relative contribution of indigenous chicken breeds to poultry meat and egg production and consumption in the developing countries of africa and Asia , 2006 .

[18]  I. Ray,et al.  Two Nineteenth Century Trade Routes in the Eastern Himalayas: the Bhutanese trade with Tibet and Bengal , 2006 .

[19]  G. Deb,et al.  Indigenous chicken genetic resources in Bangladesh: current status and future outlook , 2005 .

[20]  C. Moran,et al.  Genetic structure of the indigenous chickens of Bhutan. , 2005 .

[21]  W. Muir,et al.  Genotype-environment interactions: problems associated with selection for increased production. , 2003 .

[22]  V. Bhasin.  Ethnic Relations Among the People of Sikkim , 2002 .

[23]  B. Singh,et al.  Performance of Naked Neck versus Normally Feathered Coloured Broilers for Growth, Carcass Traits and Blood Biochemical Parameters in Tropical Climate , 2002 .

[24]  P. Horst,et al.  Productive performance of naked neck, frizzle and dwarf laying hens under various natural climates and two nutritional treatments , 2001 .

[25]  A. Galal.  Pleiotropic effects of naked neck, frizzled and double segregation genes on some phenotypic and genetic parameters of chickens under hot environmental conditions. , 2000 .

[26]  R. Yunis,et al.  The effects of the naked neck (Na) and frizzle (F) genes on growth and meat yield of broilers and their interactions with ambient temperatures and potential growth rate. , 1999, Poultry science.

[27]  J. Smyth.  Genetics of plumage, skin and eye pigmentation in chickens. , 1990 .

[28]  R. Crawford.  Origin and history of poultry species , 1990 .

[29]  J. Hodges.  Animal genetic resources. , 1990 .

[30]  J. Maciejowski,et al.  Biological and genetic foundations of animal breeding , 1982 .

[31]  P. Mérat,et al.  Gène Cou nu, performances de ponte et efficacité alimentaire selon la température chez la poule , 1980, Annales de génétique et de sélection animale.

[32]  J. Rendel,et al.  Genetics and animal breeding , 1968 .

[33]  W. Landauer.  Recessive Rumplessness of Fowl with Kyphoscoliosis and Supernumerary Ribs. , 1945, Genetics.