SELECTION PROGRAMS Flashcards
1
Q
ESTIMATED BREEDING VALUES (EBV)
A
- tool for selecting animals
- estimated genetic value of animals as potential parent of next generation
- computed using BLUP
2
Q
BLUP
A
BEST LINEAR UNBIASED PREDICTION
3
Q
STATISTICAL MODEL FOR EBV
A
- describe each trait of interest
- accounts and separate other factors influencing animal performance
- considers pedigree of animals
4
Q
ANIMAL MODEL
A
- term for statistical model when pedigree of all animals is included
5
Q
EXPECTED PROGENY DIFFERENCE (EPD)
A
- tool for selecting animals
- preferred over EBV
6
Q
SELECTION
A
- process of choosing animals to be parents of next generation
7
Q
SELECTION CRITERIA
A
- basis to obtain maximum rates of genetic improvement
8
Q
CULLING
A
- opposite of selection
- animals are removed from herd and not allowed to breed
- often applied to breeding females
9
Q
BASIS IN CULLING FEMALE ANIMALS
A
- poor productive performance
- injury
- poor genetic quality
- old age
10
Q
REPLACEMENT RATE
A
- continuous turnover of breeding females
- number of replacement females that are kept
11
Q
CULLING RATE
A
- number of females that are removed from the herd
12
Q
REPLACEMENT RATE OF PIGS AND DAIRY CATTLE
A
30 - 40%
13
Q
GENETIC PROGRESS
A
- result of various forms of selection
- measured as change in average EBVs for a herd overtime
- influenced by factors that sometime negate one another
14
Q
FACTORS INFLUENCING GENETIC PROGRESS
A
- selection intensity
- heritability
- generation interval
15
Q
SELECTION INTENSITY
A
- selecting intensely = fewer but better animals = better genetic progress
- limited by reproductive capacity
- males are selected more intensely
