Accuracy Flashcards
Define accuracy of selection.
A measure of the strength of the relationship between the true breeding values and their predictions for a trait under selection.
In dairy, _____________ is another word for accuracy
reliability
What is a basic way of explaining accuracy of selection?
Measures how well the BV of an animal is estimated.
Accuracy is represented by ___.
r
What is the range for accuracy?
0 to 1
What are the units for accuracy?
None!
The __________ the accuracy, the ________________ the EBV is a good predictor of an animal’s true breeding value.
higher ; more likely
__________ is considered high accuracy, while _________ is considered low
> 90% ; < 50%
What four items influence the accuracy of an EBV?
- Amount of information
- Heritability of the trait
- Information on correlated traits
- Accuracy of the parents
What can be used to calculate accuracy?
- heritability
- repeatability
- relationship
- performance (own or relatives)
For mass selection, accuracy = ________________.
The square root of heritability
As number of records __________________, accuracy increases.
increase
As number of progeny increase, accuracy __________________.
increases
When there are the same number of progeny, accuracy is higher with the ________________ heritability.
higher
The ____________ the heritability, the more progeny are needed to achieve a specific accuracy.
lower
