Exam 3 Flashcards
correlation between two measurements on the same animal
repeatability
measures the expected changes in one trait per unit change in another.
regression
statistic describing the average performance in a population
mean
environment affecting all records on an individual
permanent
statistics describing how two traits vary together
covariance
P stands for what
phenotype= the sum of genetic effect and environmental effect
BV stands for what
Breeding Value=value of an individual gene
DOM stands for what
Dominance= the value of the combination of genes
EPI
Epistatic=value of allele interaction across loci
PE
permanent environment= area surrounding affecting all records of an individual
TE
Temporary environment= area surrounding affecting only one record of an individual.
How an individual will performance
BV+DOM+EPI
how a parent will value
BV
The proportion of phenotypic variation caused by genotypic variation.
Heritability
Can heritability change over time
Yes it can because the genetic variance changes in response to selection
When would you like to increase repeatability and why
increasing repeatability will help indicatean animals producing ability. why would be if you wanted a cow that produces a high milk yield so increasing that traits repeatability will cause that cow to produce more and more milk over time
When would you like to increase heritability and why
increasing heritability is a good indicator of breeding value. the high the Her. the more rapid the genetic progress.
improving H^2 and r is improved by
managing the animals so that the environmental effect is consistent
