title: Effect of the frizzle gene (F) on egg production and egg quality of laying hens kept in tropical villages.
abstract: 1. Two experiments were conducted to determine the influence of the frizzle gene (F) on the production and quality of chicken eggs kept on village farms in Ghana. 2. In the first experiment, 144 pullets, 72 each of Ff and ff pullets from F1 birds, were compared in a randomised complete block design (RCBD), with three villages and 4 batches of hatch as blocks and the two feather genotypes (Ff and ff) as the treatments. 3. The Ff pullets were superior (P < 0.05) to their ff counterparts in terms of the number of eggs per clutch, egg mass and hen-housed and hen-d rates of lay, whereas age at first egg was lower (P < 0.05) in ff layers compared to Ff ones. 4. The eggs of the F1 heterozygous frizzle (Ff) layers had higher values for albumen height, Haugh unit and yolk height compared with eggs from their normal feathered counterparts. 5. In the second experiment, 144 pullets, 48 each of FF, Ff and ff pullets, were compared in a RCBD, with three villages and 4 batches of hatch as blocks and the two feather genotypes (Ff and ff) as the treatments. 6. The F2 birds with genotypes Ff and FF were better than their ff counterparts in terms of the number of eggs per clutch, egg mass, and hen-housed and hen-d rates of lay. Age at first egg was significantly lower in ff layers compared to FF and Ff ones. 7. The Haugh unit value was higher in the homozygous and heterozygous frizzles compared to the normal feathered ones. 8. The presence of the frizzle gene (F) in egg type chickens led to an improvement in egg production and egg quality traits in village chickens, and the cross-breeding scheme evaluated in this project could contribute to improved productivity.
authors.affiliation: a Department of Animal Science , KNUST , Kumasi , Ghana.
authors.forename: K
authors.initials: K
authors.lastname: Adomako
authors.forename: O S
authors.initials: OS
authors.lastname: Olympio
authors.forename: J K
authors.initials: JK
authors.lastname: Hagan
authors.forename: J A
authors.initials: JA
authors.lastname: Hamidu
mesh_terms: D000818:Animals; D002645:Chickens / Q000235:genetics / Q000502:physiology*; D004531:Eggs / Q000592:standards*; D005260:Female; D005796:Genes / Q000235:genetics; D005838:Genotype; D005869:Ghana; D006579:Heterozygote; D006720:Homozygote; D006824:Hybridization, Genetic; D008297:Male; D010058:Oviposition / Q000235:genetics* / Q000502:physiology; D019655:Quantitative Trait, Heritable; D014329:Tropical Climate