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El-Attrouny, M. (2025). Response of egg quality traits to selection in Benha chickens selected for egg production. Egyptian Poultry Science Journal, (), -. doi: 10.21608/epsj.2025.93930.1181
mahmoud mostafa El-Attrouny. "Response of egg quality traits to selection in Benha chickens selected for egg production". Egyptian Poultry Science Journal, , , 2025, -. doi: 10.21608/epsj.2025.93930.1181
El-Attrouny, M. (2025). 'Response of egg quality traits to selection in Benha chickens selected for egg production', Egyptian Poultry Science Journal, (), pp. -. doi: 10.21608/epsj.2025.93930.1181
El-Attrouny, M. Response of egg quality traits to selection in Benha chickens selected for egg production. Egyptian Poultry Science Journal, 2025; (): -. doi: 10.21608/epsj.2025.93930.1181

Response of egg quality traits to selection in Benha chickens selected for egg production

Articles in Press, Accepted Manuscript, Available Online from 19 May 2025  XML
Document Type: Original Article
DOI: 10.21608/epsj.2025.93930.1181
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Author
mahmoud mostafa El-Attrouny email orcid
2Department of Animal Production, Faculty of Agriculture at Moshtohor, Benha University, Egypt
Abstract
The current study investigated the effect of selection for increased egg production on egg quality traits over four generations in Benha chickens. A total of 18 cockerels and 180 pullets were selected according to their BLUP values for egg number at first 90 days of laying from Benha base population (control). Data of 4242 eggs produced by 756 pedigreed hens from four generations (base and three selected generations) were used to estimate heritability, genetic and phenotypic correlations and BLUP estimates for egg quality traits, Egg weight (EW), Albumen weight (AW), Yolk weight (YW), Shell weight (SW), Haugh unit (HU), Egg shape index (ESI), Albumen index (AI), Yolk index (YI) and Egg shell thickness (EST). The selection effects, correlated responses and the genetic and phenotypic trends for egg quality traits across generations were quantified or clarified applying the updated approach of the animal model program of BLUPF90. Heritability estimates were moderate or low for all traits (h2 = 0.05 to 0.47). Genetic correlations for EW was closely positively genetically correlated with AW, YW, SW, with magnitudes of 0.99, 0.57, 0.69, respectively. The ranges in BLUP for most egg quality traits in the control generation were higher than those in the three selected generation expect for HU. Accuracies of BLUP estimates for egg quality traits in all generations (control and selected) were moderate or high. The three selected generations were superior (P
Keywords
selection; egg quality traits; genetic and phenotypic trends; correlated responses
Main Subjects
Chicken
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