Dual-Purpose poultry in Organic Egg production and Effects on Egg Quality Parameter
Type de document
journalArticle
Langue source
-- Langue source --
Titre
Dual-Purpose poultry in Organic Egg production and Effects on Egg Quality Parameter
Titre français
Titre anglais
Auteur(s)
- HAMMERSHØJ M
- KRISTIANSEN GH
- STEENFELDT S
Editeur(s)
Autre(s)
Id
FX4G5SSN
Version
4773
Date ajout
18 décembre 2022 17:53
Date modification
18 décembre 2022 17:57
Résumé
Egg laying genotypes have been selected for generations due to their high yield and egg quality, resulting in efficient feed utilization and low body weight; hence, they are not suitable for meat production. This imposes an issue for the male layer chicks, which are killed at one day old. Because of ethical and food waste concerns, the search for suitable dual-purpose genotypes in order to avoid euthanasia of male day-old chicks has intensified. The aim of the present study is to evaluate potential dual-purpose genotypes for their egg quality compared to a representative egg laying genotype. Two dual-purpose genotypes with divergent characteristics were evaluated: genotype A represented an experimental crossbreed based on a broiler type male and an egg layer female, and genotype C was a crossbreed of a layer type. These were compared to a rustic genotype B and a control genotype D, which was an egg layer. Eggs were collected six times during the period of 21–54 weeks of hen age, i.e., a total of 990 shell eggs were analyzed. Examined parameters were weights of egg, shell, yolk, and albumen, by calculating their relative proportions. Shell quality was assessed by shell strength, shell stiffness, and shell thickness. Yolk quality was determined as yolk color and inclusions of blood and meat spots, and albumen quality was evaluated in terms of pH and dry matter (DM) content. The egg layer genotype produced the smallest eggs with least blood and meat spot inclusions compared to that produced by the three dual-purpose genotypes. Shell quality was superior for the layer genotype. However, the experimental genotype A laid eggs of comparable shell quality, albumen DM, and yolk weight, but also with the darkest and most red-yellow colored yolk. The two other dual-purpose genotypes produced eggs of low-medium quality. In conclusion, the genotype A could serve as dual-purpose genotype from an egg quality perspective.
Note
None
CRAW tags
- AB - Non-spécifique
- color
- dual-purpose
- egg
- genetic
- laying hen
- quality
- shell strength
- yolk
WEB tags
Titre de la publication
MDPI, Foods
Volume
10
Date caractères
2021
Date publication
1 janvier 2021
Doi
10.3390/foods10040897
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