Article
Phenotypic and genetic effects on feed intake of laying hens in different years.
Poultry science - 1 Mar 1991
Hagger C
Abstract excerpt
Feed intake from 21 to 40 wk and from 41 to 60 wk of age of brown egg layers was analyzed. The full model contained BW, egg mass (EM) output, BW change (BWCH), and age at first egg as covariates in addition to effects of plumage condition class, sire, and dam. A reduced model contained the covariates only. Between 905 and 1,161, and 880 and 1,119 hens were available in the first and second periods, respectively....
Topics
- Animals
- Body Weight
- Chickens
- Eating
- Female
- Genetic Variation
- Oviposition
- Phenotype
- Regression Analysis