Phenotypic stability of hybrids of laying types of hens

analyse statistique consommation alimentaire (animaux) consumo de piensos coquille d'oeuf crossbreds egg shell eggs feed consumption fenotipos gallina ponedora genotype environment interaction huevos layer chickens mortalidad mortalite mortality oeuf peso phenotypes pigmentation poids poule pondeuse productos del cruzamiento produit de croisement statistical analysis weight