Estimates of effects (with significance probabilities given in parenthesis) expressed at the regional (provenance) level, based on linear combinations of least-squares means that were calculated for E. globulus intra- and inter-regional crosses.

The results (in cm) are based on single-site analysis undertaken for breast-height diameter (DBH) at a given age from field planting (i.e. 2, 4, 9 or 13 years) for each of the trial sites (Geeveston and Weilangta).ADD = net difference between the additive effects of the genes in the intra-regional ♀N♂N and ♀S♂S crosses.REC = overall reciprocal effect (confounding maternal and non-maternal reciprocal effects at the regional level).HET = total mid-parent heterosis attributed to both inter-regional ♀N♂S and ♀S♂N hybrids.