Akademik Veri Yönetim Sistemi
7th INTERNATIONAL CUKUROVA AGRICULTURE AND VETERINARY CONGRESS, Adana, Türkiye, 9 - 10 Mart 2024, ss.10-11
Researchs on poultry species have shown that the sex of the embryo can be determined
by phenotypic traits through many effects of sex genes. The sex of the embryo can be
predicted by the results of some eggshell characteristics before and during incubation, or
by some practices during embryo development to determine whether the embryo is male
or female. In this study, a total of 70 eggs of broiler breeds were incubated under standard
incubation conditions of 37.5 °C temperature and 60% humidity after egg weight and egg
shape index were measured before incubation. Egg weight, shape index, egg water loss
on the 18th day of incubation, and sex ratio at hatching were determined according to the
wing feathers of day-old chicks that hatched in individual hatching pens, and shell
thickness was measured in the shells from which the chicks hatched. The thickness of the
shells was measured in three replicates from three parts of the egg: the pointed, equatorial
and blunt parts of the egg. At hatching, 40 % male and 60 % female chicks hatched from
the 70 eggs were obtained. Egg shape index and shell thickness were 72.42 ± 0.41%, 0.32
± 0.001 mm in female chicks and 74.21 ± 0.49%, 0.28 ± 0.001 mm in male chicks,
respectively and both of traits significant value was P<0.001. In conclusion, the sex
determination based on phenotypic characteristics in this study revealed that female
chicks hatched from eggs with low egg shape index and high shell thickness.