Ways to Improve Heritability and Repeatability

• Predict BV as accurately as possible to minimize mistakes in replacement selection.
• Predict PA as accurately as possible to minimize mistakes in culling.
• Emphasize environmental uniformity through good management (i.e., manage all animals as consistently as possible to minimize environmental variation or bias). Provide “codes” on data recording sheets for different “contemporary” management groups (e.g., creep feed and pastures) to avoid bias.
• Use mathematical adjustments for known environmental effects (e.g., WWADJ), which reduces total phenotypic variance and also avoids bias.