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predictable in magnitude and direction
Results of selection are...
but prediction is only as good as the information
is the genetic change that occurs as a result of selection
Response to Selection
must take into consideration environment
Response is the function of heritability and the selection differential
what?
is the difference between the mean performance of the
Selection Differential
selected individuals and the average of the entire herd
the proportion of the superiority of a group of
Heritability is...
individuals that is passed on to the offsprings
Selection progress does the goal is to decrease the mean for a trait then the
not have to be positive if.... selection differential and the response will be negative
- the length of time it takes to replace the members of
ONE generation in a herd.
- symbol= L
Generation internal
-It is a function of the reproduction rate of the animal
and how long a producer is willing to keep animals in
herd
An individual's phenotype is the result of its genetic
Breeding Value
merit and the effect of the environment
Genetic merit is also called Breeding Value
An individual receives half Expected BV= 1/2 sire+ 1/2 dam
of its genetic make up from
both parents