a1 Department of Animal Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh
a2 Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
The present review work aims at determining the potential usefulness of indigenous naked neck (INN) chicken (D. Nana) for poultry production in a hot-humid climate. INN chicken has good heat dissipation mechanism and well adaptive to harsh tropical environment and nutrition, and is highly resistant to disease and superior to indigenous full-feathered and exotic egg-type or exotic naked neck counterparts in terms of growth rate, egg production, egg quality and meat yield traits. It can produce double the standard number of eggs under improved nutrition and management conditions. Crossbreds of INN with exotic chicken can perform even better than that of exotic chicken in respect of productive and reproductive traits. Consumers prefer the meat and eggs of INN chickens for reasons of pigmentation, leanness, taste, firmness, and they are also used in special dishes. INN chicken prices are typically higher compared with those of products from exotic stocks. There are a very few published papers on the molecular aspects of INN chickens, although this is essential to determine genetic distance or relationship within or between INN chicken and indigenous full-feathered (IFF) varieties (D. nana) for future breeding plans. Therefore INN strains may be a promising and worthy genetic resource for the development of a breed or strain through selective or crossbreeding program suited to Bangladesh and in other countries where similar environments and socio-economic conditions exist. Thus, the present review provides genetic and performance information on INN chickens which may be useful for further improvement of tropical breeds.
(Received August 10 2008)
(Accepted November 10 2008)