Performance evaluation of the parents of the improved backyard poultry germplasm in sub-tropical condition of North Eastern Hill Region of India.

Productivity of traditional backyard poultry in developing countries can be enhanced by introduction of improved germplasm of backyard chicken which is adaptable to diverse ago-climatic condition. The growth and reproductive performance of parents of improved backyard chicken (Vanaraja and Srinidhi) were evaluated under intensive production system in humid sub-tropical region of North East India. We also evaluated the growth performance and mortality in terminal crosses of above parents until 6 weeks of age. At day 0 and at 25 weeks of age, body weight of Srinidhi male parent was significantly (P<0.05) higher than Vanaraja male parent. During brooding stage, mortality was 15.7% in Srinidhi male parent, 14.5% in Vanaraja male parent, 13.9% in Srinidhi female parent, and 8% in Vanaraja female parent. Hen-day egg production (HDEP) of Vanaraja female parent varied from 0.2 at 25 weeks to 54.9% at 54th weeks of age. In Srinidhi female parent, HDEP reached 60% at 35 weeks and peaked 63.9% at 39 weeks of age. Srinidhi female parent has significantly (P<0.05) lower age at first lay. Average annual egg production was significantly (P<0.05) higher in Srinidhi female parent (202 eggs vs. 137 eggs). Egg weight at 25, 30, 35, 40, 45, and 50 week of age was significantly (P<0.05) higher in Vanaraja female parent. Egg shape index and yolk index at 40 weeks of age were significantly (P<0.05) higher in Srinidhi female parent. Fertility of Vanaraja female parent was significantly (P<0.05) lower in winter. In case of Srinidhi female parent, fertility was significantly higher (P<0.05) in winter as compared to summer. In case of terminal crosses, body weight at 6 weeks of age was significantly (P<0.05) higher in Vanaraja as compared to Srinidhi. Cumulative mortality during brooding phase was 9.2 per cent in Vanaraja and 9.6 per cent in Srinidhi. In conclusion, parents of Vanaraja and Srinidhi are suitable and well-adapted birds in humid sub-tropical condition of North East India. These birds could be introduced in the region on large scale for up-scaling of traditional backyard poultry.