Article
Selection for egg shell strength in laying hens using shell membrane characteristics.
British poultry science - 1 Sept 1996
Johansson K, Orberg J, Carlgren A B, Wilhelmson M
Abstract excerpt
1. Divergent selection for attachment strength between the shell membrane and the calcium shell was performed in a White Leghorn strain. Multivariate analysis was used to estimate genetic parameters for shell membrane measurements and shell thickness. The aim was to investigate the possibility of improving shell strength in laying hens by selecting for increased attachment strength. 2. A significant direct...
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