DOI: 10.11118/978-80-7509-996-9-0096

KVALITA VAJEC HYBRIDŮ NOSNÉHO TYPU SNÁŠEJÍCÍCH VEJCE S MODŘE A ZELENĚ ZBARVENOU SKOŘÁPKOU / EGG QUALITY OF HYBRIDS LAYING EGGS WITH BLUE AND GREEN EGGSHELL

Filip Dytrt¹, Martina Lichovníková¹, Eliška Dračková¹, Vojtěch Anderle²

¹ Ústav chovu a šlechtění zvířat, Agronomická fakulta, MENDELU, Zemědělská 1, 613 00 Brno

² DOMINANT GENETIKA s.r.o., Voleč 119, 533 41 Voleč

The objective of the study was to assess how age and hybrid genotype influence egg quality and eggshell color in Dominant Greenshell GS902 and Blueshell BS229 layer hens, primarily bred for their distinct eggshell color. A total of 64 laying hens of both genotypes were included in the experiment, from which a total of 737 eggs were obtained during the experimental period and subjected to qualitative analysis and objective colour evaluation using a spectrophotometer. Egg quality was evaluated at four-week intervals from 24 to 72 weeks of age. Age significantly impacted all characteristics, including egg, albumen, yolk, and eggshell weights, eggshell thickness and strength, proportion of yolk, albumen, and eggshell, yolk color, and egg shape index (p < 0.001). Significant interactions between age and genotype were observed for yolk weight and eggshell thickness (p < 0.01 and p < 0.001, respectively). The BS229 hybrid produced significantly heavier eggs (p < 0.001), attributed to the heavier albumen (p < 0.001) and yolk (p < 0.01). However, there was no difference in eggshell strength and weight between the hybrids. Both GS902 and BS229 hybrids laid eggs with lower weight (55.9 and 56.9 g, respectively) but maintained high quality with yolk proportions (29.3 and 29.2%, respectively).

Keywords: laying hens, colour, age, eggshell, Dominant Blueshell, Dominant Greenshell

pages: 96-101, online: 2024