Flashcards in CH. 14 Deck (11):
Selection for one trait
Selection for more than one trait
Aggregate Breeding Value or Net Merit
The breeding value of an individual for a combination of traits
Selection first for one trait, then another
A level of breeding value considered optimal in an absolute or practical sense.
Independent Culling Levels
Min. standards for traits undergoing multiple trait selection. Animals failing to meet any one standard are rejected regardless of merit in other traits.
Economic Selection Index
An index or combination of weighting factors and genetic info-- either phenotypic data or genetic predictions-- on more than one trait. Economic selection indexes are used in multiple-trait selection to predict aggregate breeding value.
A weighted combination of traits defining aggregate breeding value for use in an economic selection index.
The change in aggregate breeding value (the change in profit if that is how aggregate breeding value is measured) due to an independent, one-unit increase in performance in a trait
Phenotypic Selection Index
A form of economic selection index used with phenotypic selection, In the classic form of phenotypic index, the traits in the index are identical to the traits in the breeding objective.