Three White Leghorn strains, their two-way crosses, and two commercial lines were used to evaluate the effects of aging on heterosis (H), reciprocal effects, and additive (A), Z-chromosome (Z), and heterotic effects and their variances on egg quality traits during the first laying cycle. Egg weight (EW), specific gravity (SG), Haugh unit (HU), and albumen height (AH) were measured at 240, 350, ...

An experiment using 216 Hy-Line W-36 pullets was conducted to evaluate transgenic maize grain containing the cry34Ab1 and cry35Ab1 genes from a Bacillus thuringiensis (Bt) strain and the phosphinothricin ace-tyltransferase (pat) gene from Streptomyces viridochromogenes. Expression of the cry34Ab1 and cry35Ab1 genes confers resistance to corn rootworms, and the pat gene confers tolerance to herb...

The present study was conducted to investigate the effects of four different levels of dietary probiotic (protexin) on productive traits and egg quality of broiler breeder hens. One hundred sixty female 64-week-old broiler breeders (Hubbard classic) were involved in this experiment. The birds were randomly assigned to control Group A (unsupplemented diet), Group B (0.25% protexin supplemented d...

This experiment was designed to evaluate the effects of different sources of calcium at different rates and cholecalciferol(Vitamin D3) on the performance and egg quality of Hy-line W-36 Laying hens. In this study a total of 648 hens were managed in a completely randomized design using a factorial arrangement of 3 × 3 × 2 treatments, with three calcium sources (oyster shell, OS; ground limeston...

Seventy-three billion chicken eggs are produced annually in the United States. However, less than 0.1% of these eggs are exported. Increasing the shelf-life of eggs may increase export sales. The goal of this research was to determine whether food-grade coatings on eggs may extend shelf-life under refrigerated storage. Four food-grade coatings were selected: paraffin wax, mineral oil, soy prote...

Storage of hatching eggs for a period prior to incubation is unavoidable. Extended storage periods do affects egg quality, chick development and hatchability. There are variations in responses from different strains chickens. Transylvanian naked neck chicken were stored at 16±1.5℃ either 0, 3, 6, 9, 12, 15 or 18d. Forty-four each batch set after quality determination with 6 per batch. Egg weigh...

The purpose of the study was to examine impact adding Fennel seeds (Foeniculum vulgare L.) into diets laying hens on egg quality. This conducted in poultry fields belonging Department Animal Production, College Agriculture, and University Anbar for 12 weeks. A total 72 (Lohman Brown) were used this experiment, at age 43 Hens randomly distributed six treatments groups with four replicates per tr...

Effects of dietary δ-aminolevulinic acid (ALA) supplementation on serum iron status, blood characteristics, egg production and quality were examined in laying hens in an 8-week feeding trail. Two hundred and forty (Hy-line brown, 40-week-old) layers were randomly assigned to four dietary treatments with ten replications (six layers in adjacent three cages). Dietary treatments included: 1) CON (...

Two experiments were carried out with an objective to test the comparative performance of laying hens reared in conventional California cages vs furnished regards production performance, egg quality parameters and immune status. Experiments conducted at Poultry Research Training Centre, Department Science, Nagpur Veterinary College during 2019-21. Commercial White Leghorn (BV300) (n =72) each e...