Egg quality traits as affected by selection for feed efficiency of egg production and feeding regimen in Sinai Bedouin fowl
Journal Title: IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) - Year 2018, Vol 11, Issue 12
Abstract
Current experiment conducted at Research farm of Poultry and Fish production Department, Menoufia University, Egypt. The study aimed to assess the effect of selection for feed efficiency under different feeding regimens (free (i.e. once) at 08:00 am and twice (50%:50%) at 08:00 am and 03:00 pm) in local Egyptian chickens Saini Bedouin fowl on egg quality traits (EQT). Experiment continued for three successive generations and EQT were measured, recorded and statistically analyzed for all genetic groups (1284 fresh eggs were used). Results indicated that, both selection (P≤0.05) and feeding regimen (P≤0.01) increased egg weight significantly. Eggs laid by selected birds were heavier (41.22 and 46.05 g) than those produced by control lines birds (40.16 and 42.40 g) under free and twice feeding, respectively.Moreover, external, shell and internal quality traits didn’t affected significantly by selection for feed efficiency except egg width and yolk weight. Egg length, width, shell, albumen and yolk weight significantly differed according to feeding regimen effect. Additionally, significant interaction effect was detected between lines (selection) and feeding regimen for albumin height, albumin % and yolk weight, interaction between generations with feeding regimens was statistically significant in most investigated traits.Phenotypically, feed efficiency (as a selection criterion) weakly correlated with external, egg-shell and internal EQT (ranged between -0.001 for yolk weight and 0.107 for yolk height). Moreover, egg weight highly correlated with most studied EQT (0.119 for yolk index to 1.00 for number of pores in egg-shell). Selected birds actually responded to selection (as % of control) as follow: 1.0, -1.6, 0.16 and 12.07 % versus 8.5, 3.39, 3.36 and -28.0 % under free and twice feeding regimens, respectively for external EQT (egg weight, egg length, egg width and breakage force, respectively); egg shell quality traits negatively affected (-8.09, - 24.37 and -4.04%) under free feeding regimen comparing with-5.88, 0.60 and 4.28%under twice feeding for wet-shell %, dry shell % and average shell thickness, respectively;internal quality traits (albumen height, albumen weight%, Haugh units and yolk weight%) responded to selection as -7.23, -5.97, -5.11 and 6.35% under free feeding, these responses were 1.61, 8.25, -1.01 and -8.17% under twice feeding comparing with control lines. Birds subjected to twice feeding a day better corresponded to selection and achieved higher improvement in different EQT comparing with birds fed freely (once) after two generation of selection. Results of the current study revealed that, egg quality traits could be improved in local chickens utilizing selection for feed efficiency alongside with applying twice a day feeding regimen.
Authors and Affiliations
Soltan M. E, Farrag S. A. , Enab A. A.
Keywords
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- EP ID EP421965
- DOI 10.9790/2380-1112014252.
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