E.g. blind selection for growth in cattle leads to heavier birth weights. The structure of a breeding objective Be able to use the three selection methods to choose replacements given performance data. The breeding value of an individual for a combination of traits. Economic selection indexes Tandem selection Selection for one trait and then another. Determining what target should be.
Effectiveness depends largely on genetic correlations between traits under selection.
These are minimum standards for traits undergoing multiple-trait selection. Animal failing to meet any one standard are rejected regardless of merit in other traits. Determining what the culling levels should be. Economic selection indexes are used multiple-trait selection to predict aggregate breeding value. A weighted combination of traits defining aggregate breeding value for use in an economic selection index.