Genetic Parameters For Sheep Production Traits <2025>

Selecting for higher yearling weight usually leads to higher birth weights.

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

Enhance the overall "efficiency" of the flock—producing more output with the same input.

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"

Growth rates and weaning weights. These respond well to selection but are influenced by the mother’s milk production.

This is crucial for "ewe productivity" traits. If a ewe performs well in her first lambing season (e.g., weaning a heavy lamb), repeatability tells us how likely she is to repeat 그 performance next year. High repeatability allows producers to cull underperforming animals early with confidence. Why This Matters for Your Flock