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Articles by K. Ejekwu
Total Records ( 2 ) for K. Ejekwu
  Nwachukwu, E.N. , S.N. Ibe , K. Ejekwu and U.K. Oke
  A total of 216 day-old F1 chicks generated by main and reciprocal crossbreeding of normal local (NL), naked neck (Na) and frizzle (F) chickens with Arbor Acre broiler (E) breeder stock were used in the study. Mean day-old weights of the main crossbreds (ExNL, ExNa, and ExF) were 26.80, 26.00 and 26.50g, respectively and were significantly (P< 0.05) less than mean day-old weights of 30.10, 30.50 and 30.40g for reciprocal crossbreds (NLxE, NaxE, and FxE), respectively. These reciprocal crossbreds maintained their superiority in body weight, had higher feed intake and better feed conversion ratios till the end of experiment at 18 weeks. The linear body measurements (LBMs): body length, wing length, keel length, breast width except shank length were longer in the reciprocal crossbreds than in their main cross counterparts. The final range of body weights achieved in the main crossbreds (866.33 to 941.00g) and in the reciprocal crossbreds (1350.00 to 2150.00g) depict the main cross individuals as light birds which could be developed as egg-laying lines and the reciprocal crosses as heavy birds which could be developed as meat-type or dual purpose birds. In general, the performance of these crossbred chickens showed evidence of maternal influence with each group behaving like its dam-of-origin. The FxE individuals outperformed all other genetic groups with respect to body weight and linear body parameter development, thus indicating that the frizzle gene may be advantageous in producing fast growing chickens in the humid tropics.
  Nwachukwu, E.N. , S.N. Ibe and K. Ejekwu
  This study was designed to evaluate the effect of main and reciprocal crossbreeding on short term egg production and egg quality characteristics of crossbred Normal Local (NL), naked neck (Na) and frizzle chicken X exotic broiler breeder stock. Result showed that the main crossbreds (ExNL, ExNa and ExF) were significantly (p<0.05) lighter in body weight at sexual maturity (960.00, 812.50 and 1030.00 g), respecting than their reciprocal crossbred (NLxE, NaxE and FxE) counterparts with body weights of 1891.67, 1576.50 and 2072.00 g, respectively. The reciprocal crossbreds also had significantly heavier egg weight at first egg and greater egg number (90 days of lay). Shell thickness and yolk weight were not significantly different (p>0.05) in all genetic groups while egg length, yolk index, albumen weight and Haugh unit were significantly (p<0.05) higher for the reciprocal crossbreds. The frizzled individual in both crosses outperformed their normal feather and naked neck counterparts in body weight and most of the egg traits evaluated thus, indicating that the frizzling gene may be advantageous in poultry production in the humid tropics. Generally, reciprocal crossbreeding resulted in a more rapid improvement of the local chicken body weight, egg production and the egg quality traits studied.
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