ORIGINAL PAPER
Glutathione peroxidase activity in different
breeds and sexes of chickens during embryonic
development up to peak of egg production
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1
Fayoum University, Faculty of Agriculture,
Department of Poultry Sciences, 63514 Fayoum, Egypt
2
Fayoum University, Faculty of Agriculture,
Department of Genetics, 63514 Fayoum, Egypt
3
University of Kaposvár, Research Group of Animal Breeding and Hygiene,
Faculty of Animal Science,
H-7400 Kaposvár, Hungary
4
Szent István University,
Department of Nutrition, Faculty of Agricultural and Environmental Sciences,
H-2103 Gödöllõ, Hungary
Publication date: 2008-10-27
Corresponding author
M. Mézes
Szent István University,
Department of Nutrition, Faculty of Agricultural and Environmental Sciences,
H-2103 Gödöllõ, Hungary
J. Anim. Feed Sci. 2008;17(4):588-599
KEYWORDS
ABSTRACT
Glutathione peroxidase (GSHPx) activity was investigated in the liver, red blood cells (RBC)
and blood plasma (BP) of different chicken genotypes. Significant differences among genotypes
and age groups were found in liver GSHPx activity during embryonic development and in day-old
chickens. Breed, sex and age effects were found in RBC and BP from one day of age until peak egg
production. A negative correlation was found between embryo liver GSHPx activity and egg weight
(-0.24; P≤0.01), between RBC and BP GSHPx activity and body weight (-0.32 and -0.44; P≤0.01),
and between liver and RBC GSHPx activity (-0.54; P≤0.01), while positive correlations were demonstrated
between liver and BP (0.66; P≤0.01) and BP and RBC (0.32; P≤0.01) GSHPx activity. In
conclusion, variation in GSHPx activities in different chicken breeds during development suggests
that it is genetically regulated. This finding indicates that GSHPx activity may be useful in selection.
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