Table 5. Overview of epistatic interactions identified in reconstructed F2 population and three environments for 15 yield-correlated traits.
| Trait | SY§ | SP | BY | PN | HI | PH | PY | SN | BN | OIL | PRO | MT | FT | SW | DT | Total |
| Total number | 17 | 29 | 15 | 19 | 13 | 22 | 18 | 21 | 19 | 15 | 16 | 13 | 17 | 28 | 10 | 272 |
| Repeatable | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| R2 min (%) | 4.2 | 1.6 | 2.1 | 1.9 | 3.5 | 2.0 | 3.1 | 2.8 | 2.0 | 3 | 1.9 | 2.9 | 1.4 | 1.4 | 4.1 | 1.4 |
| R2 max (%) | 9.1 | 10.0 | 9.6 | 18.3 | 7.9 | 8.3 | 16.6 | 12.5 | 14.5 | 15.6 | 13.9 | 9.0 | 14.2 | 11.8 | 9.7 | 18.3 |
| R2 mean (%) | 5.8 | 4.5 | 4.3 | 5.0 | 5.8 | 4.5 | 6.0 | 5.0 | 5.0 | 6.4 | 5.0 | 6.3 | 5.1 | 3.6 | 6.8 | 5.1 |
| NN type* | 6 | 14 | 8 | 9 | 7 | 11 | 6 | 11 | 11 | 9 | 10 | 9 | 10 | 10 | 5 | 136 |
| NS/SN type | 9 | 10 | 6 | 9 | 4 | 6 | 8 | 9 | 7 | 5 | 4 | 4 | 5 | 13 | 4 | 103 |
| SS type | 2 | 5 | 1 | 1 | 2 | 5 | 4 | 1 | 1 | 1 | 2 | 0 | 2 | 5 | 1 | 33 |
| Total R2 AAmean (%) | 14.8 | 20.5 | 18.5 | 13.5 | 16.5 | 13.1 | 15.0 | 14.2 | 14.4 | 16.1 | 13.3 | 15.4 | 15.2 | 12.8 | 10.8 | 14.6 |
| Total R2 AD/DAmean (%) | 12.2 | 13.7 | 8.4 | 8.5 | 14.0 | 11.1 | 12.9 | 13.4 | 9.2 | 8.7 | 4.9 | 8.5 | 7.6 | 11.3 | 7.6 | 10.4 |
| Total R2 DDmean (%) | 6.4 | 9.3 | 5.6 | 9.5 | 7.0 | 9.0 | 8.1 | 7.3 | 8.0 | 7.2 | 4.0 | 3.5 | 6.3 | 9.3 | 4.1 | 7.1 |
| Total R2 E-QTLmean (%)† | 33.4 | 43.5 | 32.5 | 31.5 | 37.5 | 33.2 | 36.0 | 34.9 | 31.6 | 32.0 | 22.2 | 27.4 | 29.1 | 33.4 | 22.5 | 32.1 |
| Total R2 M-QTLmean (%) | 26.4 | 36.0 | 27.5 | 28.3 | 35.2 | 30.1 | 35.7 | 34.0 | 25.5 | 51.7 | 30.4 | 36.2 | 48.9 | 53.7 | 36.8 | 36.0 |
| Number of loci that involved one or multiple epistatic interactions | ||||||||||||||||
| One | 12 | 19 | 10 | 13 | 3 | 21 | 8 | 11 | 14 | 13 | 10 | 10 | 6 | 16 | 7 | 173 |
| Two | 13 | 23 | 12 | 14 | 14 | 14 | 16 | 22 | 14 | 12 | 11 | 8 | 17 | 21 | 9 | 220 |
| Three | 2 | 9 | 2 | 6 | 4 | 6 | 5 | 6 | 6 | 4 | 4 | 4 | 7 | 11 | 2 | 78 |
| Four | 4 | 4 | 3 | 3 | 3 | 2 | 5 | 0 | 1 | 0 | 4 | 2 | 2 | 5 | 2 | 40 |
| Five | 1 | 1 | 2 | 1 | 2 | 1 | 2 | 2 | 2 | 0 | 3 | 0 | 1 | 2 | 0 | 20 |
| Six | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 1 | 1 | 0 | 6 |
| Seven | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 7 |
§
For the abbreviation of the traits (ordered according to their correlation coefficients with SY), see MATERIALS AND METHODS.
*Epistatic interactions between (SS) two loci with significant main-effects, (SN/NS) a locus with significant main-effect and a locus with non-significant main-effect, and (NN) two loci with non-significant main-effects.
†
M-QTL and E-QTL are the abbreviations for main-effect QTL and epistatic QTL respectively.