Dual-Purpose Poultry in Organic Egg Production and Effects on Egg Quality Parameters
Type de document
journalArticle
Langue source
-- Langue source --
Titre
Dual-Purpose Poultry in Organic Egg Production and Effects on Egg Quality Parameters
Titre français
Titre anglais
Auteur(s)
- HAMMERSHØJ Marianne
- KRISTIANSEN Gitte Hald
- STEENFELDT Sanna
Editeur(s)
Autre(s)
Id
8UHSQ4UJ
Version
3412
Date ajout
22 avril 2021 12:04
Date modification
22 avril 2021 12:04
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. Three 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, genotype B was a pure breed, and genotype C was a crossbreed of a layer type. These were compared to 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 1080 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 - Spécifique
- FREDO qualité des produits
- FREDO santé animale
- GEO Danemark
- euthanasia
- poule pondeuse
- poussin
- volaille
- élevage
WEB tags
- dual-purpose
- egg
- egg albumen
- egg weight
- genotype
- layer hens
- quality
- shell strength
- yolk color
Titre de la publication
Foods
Volume
10
Pages
897
Date caractères
2021/4
Date publication
23 avril 2021
Doi
10.3390/foods10040897
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