genetic selection

Question 1

estimated breeding values

Answer 1

the additive genetic merit for a trait
= double the expected deviation of progeny’s performance (double because each parent passes on 50% of their genetics to their offspring

Question 2

predicted transmitting ability

Answer 2

the additive genetic merit for a trait
= the expected deviation of progeny’s performance from the population mean
PTA = 1/2 EBV

Question 3

calculating EBV

Answer 3

information from:
animal, animal’s progeny, animal’s parents, animal’s siblings, more distant relatives
EBV=h2p
h= heritability
p = difference in individual’s phenotype from population mean

Question 4

reliability

Answer 4

confidence that EBV measures true genetic merit

Question 5

what affects reliability

Answer 5

depends on amount of information available:
number of records
genomic information
lowest with pedigree only
highest with large numbers of progeny

Question 6

what does phenotype selection rely on?

Answer 6

high heritability

Question 7

increasing response to selection

Answer 7

increase selection intensity
increase accuracy of selection
increase genetic variability
reduce generation interval - age of parents