Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

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Gryzińska M. 2003. POLYMORPHISM OF SELECTED PROTEINS OF YOLK AND WHITE OF EGG IN RELATION TO PERFORMANCE TRAITS OF HENS, EJPAU 6(2), #05.
Available Online: http://www.ejpau.media.pl/volume6/issue2/animal/abs-05.html

ABSTRACT

The studies were aimed to establish a connection between polymorphism of egg-yolk and egg-white proteins and selected performance traits of laying hens. Data on performance of the studied breeds of hens were collected from breeding records. The following traits were measured in the analysed hens: body weight at 8, 18, and 20 days of age, age of sexual maturity, initial egg-laying rate, mean egg weight at 33 weeks of age, number of eggs with a complete eggshell, number of eggs with a broken eggshell, number of eggs without an eggshell or with a soft one, and a mean eggshell strength at 33 weeks of age.

Key words: hens, proteins, eggs, polymorphism, performance..

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