Article
Expansion of projected lactation yield to stabilize genetic variance.
Journal of dairy science - 1 Dec 1991
VanRaden P M, Wiggans G R, Ernst C A
Abstract excerpt
Information on partial lactations often is included in genetic evaluations by predicting the cow's eventual 305-d yield. Such projected yields have less phenotypic and genetic variation than completed yields but were modeled as having greater or equal variation in evaluations. Analysis of first lactations from 48,424 daughters of 844 Holstein sires indicated that yields predicted early (46 to 75 d) in lactation...
Topics
- Animals
- Cattle
- Female
- Genetic Variation
- Genotype
- Lactation
- Likelihood Functions
- Lipids
- Milk
- Milk Proteins
- Phenotype