poultry genetics Flashcards
1
Q
breeders equation (look at notes) what does each thing represent
R= ih^2sigmasubp/L
R= (everything)/ L
A
- R= response to selection ie genetic change
- i= selection intensity (v high in poultry because hens have many kids so they can be selective on who they choose as parents)
- h^2= heritability
- sigma sub p= phenotypic variation
- L= generation interval
2
Q
what is feed conversion
A
amount of food you need to grow 1 kg of weight
3
Q
negative correlation to body weight
A
- walking ability
- mortality
- egg number
- fertility
- hatchability
4
Q
some positive correlation to body weight
A
- feed conversion
- breast meat yield
- egg size
5
Q
what do you try to select with along with growth
A
leg strength
6
Q
duck production
A
- pekin duck; rapid growth, white feathers, 8 million ducks
7
Q
how long are ducks brooded for
A
10-14 days
8
Q
ideal duck flooring
A
straw or slatted flooring
9
Q
when do ducks begin egg production
A
21 weeks
10
Q
issues with ducks and water
A
- drink large amounts and excrete watery dropping
- often spill water
11
Q
turkeys are
A
sexually dimorphic (males different to females)
12
Q
male turkey
A
tom
13
Q
why artificial insemination for turkeys
A
they have low fertility and males do damage to females by scratching
