Free Access
Table IV
Predicted genetic responses at 10% selection intensity (percentage in parethenses) in juvenile growth and wood quality traits and net present value profitability (breeding objective response) for index selection using genetic parameters determined in this study. Three different scenarios were considered: (A) index selection using modulus of elasticity (MoESS) and diameter (DBH) as selection traits and maximising profitability; (B) restricted index selection keeping juvenile wood MoESS constant; (C) restricted index selection among the genotypes with positive breeding values for both MoESS and DBH.
| Predicted genetic response | |||||||
|---|---|---|---|---|---|---|---|
| Scenario | DEN | DBH | MoESS | MfA | SG | LSH | Profitability |
| (kg m−3) | (mm) | (GPa) | (deg) | (deg) | (%) | (Aus$ha−1 y−1) | |
| (A) | –13.0 | 10.7 | –0.25 | 0.56 | 0.37 | 0.06 | 2409 |
| (–3.7%) | (6.8%) | (–5.3%) | (1.9%) | (9.4%) | (4.4%) | (53.1%) | |
| (B) | –10.37 | 10.44 | –0.04 | –0.20 | 0.18 | 0.05 | 2282 |
| (–2.9%) | (6.6%) | (–0.5%) | (–0.7%) | (4.5%) | (3.9%) | (50.3%) | |
| (C) | –3.51 | 7.02 | 0.29 | –1.29 | –0.16 | 0.02 | 1498 |
| (–1.0%) | (4.5%) | (6.0%) | (–4.4%) | (–4.1%) | (1.8%) | (33.0%) | |