Related Experiment Videos
Summary
Selective breeding significantly increased turkey semen yield by over 100% within five generations. This genetic selection also enhanced egg production without negatively impacting fertility or hatchability.
Area of Science:
- Animal Science
- Poultry Genetics
- Reproductive Biology
Background:
- Optimizing semen yield is crucial for artificial insemination programs in turkey breeding.
- Genetic selection offers a potential avenue for improving reproductive efficiency in poultry.
- Previous studies have explored various factors influencing turkey reproductive traits.
Purpose of the Study:
- To evaluate the effectiveness of selective breeding for increasing semen yield in turkeys.
- To assess the correlated responses of other reproductive and growth traits to semen yield selection.
Main Methods:
- Five generations of selection for increased semen yield in a turkey line.
- Comparison of the selected line with a randombred control line.
- Measurement of semen yield, sperm concentration, bent sperm, egg production, body weight, fertility, and hatchability.
Main Results:
- Semen yield more than doubled in the selected line compared to the control line.
- Realized heritability for semen yield was estimated at 0.35 +/- 0.20.
- Egg production increased significantly in the first generation and was maintained; no consistent changes were observed in sperm concentration, bent sperm, fertility, or hatchability.
Conclusions:
- Selective breeding is a highly effective strategy for substantially increasing turkey semen yield.
- Genetic gains in semen yield did not adversely affect key reproductive parameters like fertility and hatchability.
- Increased egg production is a beneficial correlated response to selection for semen yield in turkeys.