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Boutrous, N. (2025). Direct and maternal genetic effect for egg quality and hatchability of Gimmizah chickens selected for body weight. Egyptian Poultry Science Journal, (), -. doi: 10.21608/epsj.2025.83087.1172
Nabile Galabe Boutrous. "Direct and maternal genetic effect for egg quality and hatchability of Gimmizah chickens selected for body weight". Egyptian Poultry Science Journal, , , 2025, -. doi: 10.21608/epsj.2025.83087.1172
Boutrous, N. (2025). 'Direct and maternal genetic effect for egg quality and hatchability of Gimmizah chickens selected for body weight', Egyptian Poultry Science Journal, (), pp. -. doi: 10.21608/epsj.2025.83087.1172
Boutrous, N. Direct and maternal genetic effect for egg quality and hatchability of Gimmizah chickens selected for body weight. Egyptian Poultry Science Journal, 2025; (): -. doi: 10.21608/epsj.2025.83087.1172

Direct and maternal genetic effect for egg quality and hatchability of Gimmizah chickens selected for body weight

Articles in Press, Accepted Manuscript, Available Online from 19 May 2025  XML
Document Type: Original Article
DOI: 10.21608/epsj.2025.83087.1172
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Author
Nabile Galabe Boutrous email
Anim. Prod. Res. Inst., Agric. Res. Cent, Egypt
Abstract
The present experiment was conducted on Gimmizah (GM) chickens selected for body weight at 12-wk of age through three generations. The objective of this study was to detect the genetic components of direct, maternal and environmental effect of egg quality and hatchability. Second generation represents increase (p>0.05) of some egg quality traits such as hatching egg weight, egg shape index, egg surface area, egg shell density, eggshell thickness without membranes, albumen weight, albumen height, yolk weight, and egg shell weight compared with those for base population (G0) and first generation (G1). Generally, Additive genetic maternal was surpassed those for the additive genetic direct and permanent environmental hen effects for the most treats. Realized heritability estimates over the studied three generations of selection proved that the records direct estimate ((h2a) recorded highest value of heritability compared with those for maternal (h2m) and permanent environmental hen effect (h2pe) with respect to hens body weigh at 45-wk of age, hatching egg weight, egg surface area, eggshell thickness without membranes, albumen weight, albumen height, yolk weight ratio, eggshell weight, eggshell weight percent, albumen weight percent, and yolk/albumen ratio. Also, correlation coefficients showed that there are highly significant positive genetic correlations between most of the studied egg quality traits and hatchability traits. Also, there are highly maternal positive maternal genetic correlations between hatching egg weight and each of egg shape index, eggshell thickness, albumen weight, albumen height, yolk weight, fertility, total embryonic mortality and hatchability of fertile eggs. The obtained results of low estimates of heritability for fertility and hatchability and the highly estimates for egg quality traits besides the highly direct and maternal genetic correlations suggesting the applicability of some egg quality traits in programming the selection index combining with body weight selection as indirect way for improving fertility and hatchability with body weight.
Keywords
heritability; genetic; hatchability; egg; quality
Main Subjects
Chicken
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