Fig. 2. Example of a halfsib heterosis (HS-heterosis) calculation for genotype ABI408. HS-heterosis is equal to the mean of ABI408 x falcata crosses (SFHS_ABI408) minus the mean of ABI408 crossed to other sativa genotypes (WHS_ABI408) and the falcata x falcata cross mean (FFC_mean). This difference is divided by the mean of WHS_ABI408 and FFC_mean.