Agriculture
Volume 6, Numéro 1, Pages 10-18
2015-06-30
Egg Quality Traits Of Two Phenotypes Of Local Chickens. Comparison With Eggs Of Commercial Strain
Auteurs : Dahloum Lahouari . Halbouche Miloud . Arabi Abed .
Résumé
An experiment was carried out to evaluate the egg quality traits in two local chickens, normally feathered (NORM), naked neck-frizzled (NaF), and one commercial line, Lohmann Tradition (LT). A total of three hundred eggs comprising of one hundred eggs from each genotype were collected. The Lohmann strain had significantly heavier (P<0.05) egg weight and higher shape index. Egg shell weight and albumen weight were also higher in this group (P<0.05 and P<0,01). The Na, Fgenes in combination state caused the production of better egg weight (+6,4g, P<0.05), yolk weight (+3,0g; P<0.01) and yolk to albumen ratio (+3%; P <0,01) when compared to normal feathered counterpart. In addition, egg quality in term of fat highly favored NaF laying hens compared to others. Haugh unit score was not significantly influenced (P>0,05) by genotype. There was strong correlation (P <0,001) ranged from 0,77 to 0,95 between egg weight and albumen weight. The potential interest of further studies is stressed, in view of possible use of the naked neck-frizzle layers for egg production in hot climates.
Mots clés
Local chicken, egg quality, naked neck, frizzle, phenotypic correlations.
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