Ge Analysis Measurements and Their Correlations With Egg Quality Traits and Egg Chemical Composition of Different Eggshell Patterns of Japanese Quail

Abstract

he present study was carried out to identify the effect of color and pattern varieties of Japanese quail egg shell on image analysis measurements for the egg shell, egg quality traits and chemical composition of whole egg components, as well as the correlations between image analysis measurements for egg shell with egg quality traits. Image analysis parameters of egg shell, egg quality traits, chemical composition for egg components were evaluated at 19 weeks of age for a total 744 Japanese quail eggs collected from 186 identified females classified by their egg shell imprints according to egg shell color and pattern into five groups of egg type [1 st group: white egg shell (Non-pigmented), 2 nd group: grayish white egg shell pigmented with small black pigments spots (Black spotted), 3 rd group: small black pin dots on grayish brown shell back ground (Pin dotted), 4 th group: slightly blue pigments (Sandy gray), 5 th group: brown egg shell with heavily dark pigmentation (Heavily dark)]. There are significant differences (P≤0.05) between studied egg shell patterns for image analysis measurements. Sandy gray eggs had significantly the highest values, while white egg had the lowest values for all studied external egg quality traits comparing with other egg groups. No significant influence of egg shell patterns on chemical composition analysis for egg components for different gropes except moisture and fat % in white eggs (71.3 and 9.7% respectively) which were significantly lower compared to other egg shell groups. Significant correlations, whether positive or negative were found between image analysis measurements of egg shell and some egg quality traits for different studied groups which can be used in future studies.