EFFECT OF LAYING HEN GENOTYPE ON EGG QUALITY IN A FLOOR REARING SYSTEM

4th International Symposium On Biotechnology (2026),  [pp. 447-453]
 
AUTHOR(S) / АУТОР(И): Simeon Rakonjac , Snežana Bogosavljević-Bošković , Vladimir Dosković , Zdenka Škrbić , Miloš Lukić , Veselin Petričević , Milun D. Petrović 
 
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DOI: https://doi.org/10.46793/SBT26.447R

ABSTRACT / САЖЕТАК:

The aim of this study was to evaluate the effect of genotype (Isa Brown and New Hampshire) on egg quality in a floor rearing system. Fifteen eggs per group were collected at 32 weeks of age and analyzed for external and internal quality parameters (egg weight, shape index, albumen height, Haugh unit, yolk color, and shell breaking strength), as well as for chemical composition (dry matter, minerals, protein, and lipids).

Eggs from Isa Brown hens exhibited greater egg weight, higher shape index, and superior shell breaking strength, whereas New Hampshire eggs had more intensely pigmented yolks. No significant differences were observed in albumen height or Haugh units between the genotypes. Regarding chemical composition, significant differences were found only in lipid content, which was higher in New Hampshire eggs. No significant differences were detected in dry matter, mineral, or protein content.

KEYWORDS / КЉУЧНЕ РЕЧИ:

Isa Brown, New Hampshire, floor rearing system, egg quality, chemical composition of eggs

ACKNOWLEDGEMENT / ПРОЈЕКАТ:

The research presented in this article is part of No. 451-03-33/2026-03/ 200088 and 451-03-33/2026-03/ 200022 financially supported by Ministry of Science, Technological Development and Innovation of Republic of Serbia.

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