Genetic Model for Quantitative Traits Flashcards
Remember, the goal of animal breeding is to __________ the next generation through _________ and ____________.
improve ; selection ; mating
What is the genetic equation that we use with quantitative traits?
P = u + (A + D + I) + E
__________ is the source for genetic change.
Variation
Define Breeding Value (BV).
The value of an individual as a (genetic) parent.
OR
Represents the sum of additive genetic contribution from each locus.
What is the main difference between Additive and Non-additive effects?
Additive is transferred to offspring. Non-additive is NOT transferred.
Define Additive effect.
The contribution of an allele to a genotype and phenotype.
What does EPD stand for?
Expected Progeny Difference
What does PTA stand for?
Potential Transmitting Ability
In terms of equations, are EPD and PTA the same?
Yes
What is the equation for EPD/PTA?
EPD = 1/2BV
PTA = 1/2BV
Define EPD.
The expected difference between the mean performance of the individual’s progeny and the mean performance of all progeny.
Can EPDs change for an individual?
Yes
True or False. EPDs can be compared across breeds with no adjustment.
False
Define Gene Combination Value (GCV).
The part of an individual’s genotypic value that is due to the effects of gene combinations (D + I). This part is NOT transmissible!
What is the genetic equation using BV and GCV?
P = u + BV + GCV + E
