Without knowing these parameters, a producer might spend years trying to "breed" for a trait that is actually 90% determined by the quality of the pasture. By focusing on and using Estimated Breeding Values (EBVs) , you can: Increase the average weight of lambs at market. Improve the uniformity and micron of wool clips.
Breeders use "Selection Indices" to balance these correlations, ensuring they don't accidentally compromise animal health or product quality while chasing growth. 3. Repeatability: Consistency Over Time
Understanding the genetic parameters of sheep is the backbone of any successful breeding program. It allows producers to move beyond guesswork and use data to predict how traits like growth, wool quality, and fertility will pass from one generation to the next. 1. Heritability ( h2h squared ): The "Pass-on" Rate Genetic Parameters for Sheep Production Traits
Traits rarely move in isolation. When you select for one, you often get a change in another—sometimes for the better, sometimes not.
Reproductive traits like twinning rates or lamb survival. Because these are heavily influenced by environment/management, progress through breeding is slow. 2. Genetic Correlations: The "Package Deal" Without knowing these parameters, a producer might spend
Traits like carcass lean meat yield and fiber diameter. You can make rapid progress just by selecting the best-performing individuals.
Are you looking to apply these parameters to a or focusing on a particular goal like meat yield versus wool quality ? It allows producers to move beyond guesswork and
Selecting for higher yearling weight usually leads to higher birth weights.