Table 2 Least-squares means for true genetic gain in generation \({t}\) = 2 (\(\Delta {\text{G}}_{{{\text{true}}1 - 2}}\)) realised by POCS, GOCS, and truncation selection at a 0.01 \(\Delta {\text{F}}_{{{\text{true}}4 - 10}}\) in a breeding scheme with genomic prediction