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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2010 > Volume 9 Number 1 > Lamiaa M. Radwan, M.M. Fathi, A. Galal and A. Zein El-Dein

Mechanical and Ultrastructural Properties of Eggshell in Two Egyptian Native Breeds of Chicken

Lamiaa M. Radwan, M.M. Fathi, A. Galal and A. Zein El-Dein
Department of Poultry Production, Faculty of Agriculture, Ain Shams University, Egypt
Abstract :

The objective of the study was to assess mechanical and ultrastructural properties of eggshell in
Dandarawi and Fayoumi chicken breeds. At 30 weeks of age, 180 eggs (90 of each breed) were randomly
chosen. The results showed that the Fayoumi eggs had significantly higher specific gravity and mechanical
properties values (thickness and breaking strength of eggshell) than that of Dandarawi ones. With respect
to ultrastructural traits, it could be noticed that the relative palisade layer (effective thickness) of Fayoumi eggs
was significantly higher than that of Dandarawi ones. Opposite trend was noticed for relative cap layer.
Concerning ultrastructural variants, the Fayoumi eggs owned shells with significantly higher values of
confluence and cuffing traits. Conversely, the Dandarawi eggs have superior values of fusion, alignment and
type B's traits than Fayoumi ones

Keywords :
Native breeds, eggshell, mechanical traits, ultrastructural

Date Deposited : 25 Jun 2011 10:17

Last Modified : 25 Jun 2011 10:17

Official URL:

Volume 9, Number 1, - 2010 , ISSN 1682-8356

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