4.1. Effects of breeding goal and genetic parameters
High economic weight on CAND, combined with positive genetic correlation between the two traits was shown to increase the profit for all selection strategies, without changing the rank of the strategies (Fig. 1). Further, a high correlation between the nucleus breeding goal and the grow-out breeding goal increased the profit for all selection strategies. This simply shows the advantage of performing selection in the nucleus that also increases the grow-out performance. The lowest correlation between the breeding goals tested in this study was 0.6 (Table 3). To perform selection in the dissemination steps could have even more impact if this correlation was lower. However, if the correlation between the breeding goals in the nucleus and grow-out tiers is very low, it could be a good idea to change the breeding goal in the nucleus, as this should aim to increase grow-out performance. Still, in cases where the nucleus breeding scheme aims to serve many grow-out environments, selection in the dissemination steps could be a good alternative to running several separate nucleus breeding schemes.