Fig. 4

Illustration of the method of Moav and Hill [12] for finding the optimum selection index when genetic gain after n or \(m>n\) generations is to be maximized. The level sets of the profit function from Eq. (5) are colored blue. The red ellipses are the response curves for n and m generations of selection. The traits are genetically correlated. Trait 1 has weight 0.2, a high heritability, and is close to the optimum. Trait 2 has weight 0.8, a lower heritability and is distant from the optimum