Methods of farm animal improvement II - SS3 Agriculture Past Questions and Answers - page 2
Explain the concept of hybrid vigor in farm animal improvement.
Hybrid vigor, or heterosis, is a phenomenon where the offspring of two different breeds or genetic backgrounds exhibit superior traits compared to both parent breeds. It often leads to enhanced health, productivity, and adaptability in livestock.
How can farmers strike a balance between trait improvement and genetic diversity maintenance in selective breeding programs?
Farmers can strike this balance by periodically introducing genetic diversity from unrelated breeds while still focusing on improving desired traits. This approach helps prevent inbreeding and maintains a healthy genetic pool.
What are the primary challenges faced by small-scale farmers when implementing selective breeding programs?
Small-scale farmers may encounter challenges like limited resources, access to diverse breeding stock, and the expertise required for successful selective breeding. These factors can make it more challenging for them to engage in such programs.
Why is genetic diversity crucial for the long-term sustainability of livestock populations?
Genetic diversity ensures that livestock populations have the potential to adapt to changing environmental conditions and resist diseases. It reduces the risk of genetic disorders caused by inbreeding and preserves the overall health and productivity of the animals.
Provide an example of a specific trait that farmers might aim to improve through selective breeding in poultry farming
One example is egg-laying efficiency in poultry farming. Farmers may selectively breed hens that consistently lay more eggs, leading to increased egg production in the flock over generations.