Table 3. Percentage increase in the probability to breed a top-ranking genotype, for the selected population scenario.

	CV of the SD of gametic GEBV $\left(SD\left({\sigma }_{\widehat{g}}\right)/0.5{\sigma }_{\widehat{A}}\right)$
p	0.05	0.10a	0.15	0.20
0.5	0	0	0	0
0.2	0	1	2	3
0.1	1	2	4	8
0.05	1	4	10	16
0.01	3	13	29	53
0.005	4	18	42	78
0.001	8	36	89	175

Values are the relative increase (%) in the number of individuals in the offspring generation that are in the top p fraction for GEBV when parents are selected on Index 5, compared to selection on ordinary GEBV. The top p-fraction was defined based on the offspring of parents selected on ordinary GEBV.

^aThis is the value found in dairy cattle (Segelke et al. 2014).