No G×E on egg qualities and body weight between cage and floor systems, implications for breeding programmes in laying hens - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

No G×E on egg qualities and body weight between cage and floor systems, implications for breeding programmes in laying hens

Résumé

The main objective of this study was to quantify genotype-by-environment interactions for egg quality traits and body weight in laying hens between cage and cage -free systems. Records of 18,524 eggs for quality traits and 10,266 hens for body weight from a pedigreed Rhode Island Red line were used. Hens were hatched across 5 batches from 2018 to 2020, siblings are housed in two systems: a cage and a floor system. Random regressions were modelled to estimate variance components. Heritability estimates were moderate to high in both systems(0.29-0.77). Genetic correlations between the cage and the floor system were high (≥0.79), and genetic correlations between the intercept and the slope of the reaction norm ranged from -0.69 to 0.27. The results indicate that there is no need to maintain a dedicated breeding programme per system, if the breeding goals are identical, which is unlikely.
Fichier principal
Vignette du fichier
BEDERE 2022_WCGALP_no GxE.pdf (253.57 Ko) Télécharger le fichier
BEDERE_WCGALP2022_GxE_38504_v2.pdf (1.55 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03759804 , version 1 (27-09-2022)

Identifiants

Citer

Nicolas Bédère, Lorry Bécot, Thierry Burlot, Pascale Le Roy. No G×E on egg qualities and body weight between cage and floor systems, implications for breeding programmes in laying hens. 12. World congress on genetics applied to livestock production ( WCGALP ), Jul 2022, Rotterdam, Netherlands. pp.2483-2486, ⟨10.3920/978-90-8686-940-4_600⟩. ⟨hal-03759804⟩
19 Consultations
20 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More