Primary Breeding Industry

Question 1

What is the function of the primary breeding industry

Answer 1

• genetic selection
• distribution of stock to multiplier hatcheries
• maintenance of stalks
• technical assistance
• disease control

Question 2

T/F all commercial poultry are the result of cross breeding

Answer 2

true

Question 3

what are selected pure lines

Answer 3

• great grandparent primary breeders
• A and B and C and D

Question 4

what are the crosses that are initially made

Answer 4

A males X B females
C males X D females
- grandparent primary breeders

Question 5

what cross is a multiplier breeder

Answer 5

AB males ( selected for size and production) X CD females (selected for performance of meat and egg lay)

Question 6

what is the final cross for a commercial production unit

Answer 6

• ABCD
• no one can create new without getting from hatchery

Question 7

why is there so many primary breeder farms

Answer 7

• maintain genetics
• protection from the breach of biosecurity

Question 8

what are meat chickens selected for

Answer 8

• breast size
• feed efficiency
• fast growth
• livability

Question 9

what groups need quota

Answer 9

• muliplier breeders ( AB males and CD females)
• commercial production units ( ABCD

Question 10

what are the reasons for cross breeding

Answer 10

• combine stocks with different traits (4 opportunities to trade traits)
• heterosis or hybrid vigour
• multiplication of stock
• patent (holds genetic infor)

Question 11

what is heterosis or hybrid vigor

Answer 11

• 2 different breeds out perform parents/ compliment each other
• enhances genetics

Question 12

how fast do the broiler stocks multiply

Answer 12

• 2017 = 15 oullets per year
• 2022 = 39 744 T
• extremely fast! currently trying to slow down the process

Question 13

how can egg production be changed by 1 egg increase

Answer 13

• one pure line over 36 years = egg number 60 + 2.1 - over a year it a chicken can produce 2 more eggs thats 67000 over that year

Question 14

what three sources of data are used for selection

Answer 14

• pedigree evaluation (research farm) = take the lines and test them all the time
• field test program - hybrid vigor, different in living environment, management is different
• DNA markter data - blood sample - select overall on genes

Question 15

what else is important for primary breeders

Answer 15

• continue improvement in all traits over time
• balace annual genetic progress, in all traits = livability