Table 4.
Key used for the determination of prevailing seed dormancy class and level, based on germination experiments with different preconditions following preliminary assignment to potential classes.
| Potential dormancy classes | Class and level |
|---|---|
| 1. ND/PD | |
| 1.1. FGP (FRESHLD) ≥ FGP(CDSfresh) and FGP (FRESHLD) ≥ FGP (CWSfresh/CWSsubs) and MGT (FRESHLD) ≤ MGT (CDSfresh) and MGT (FRESHLD) ≤ MGT(CWSfresh/CWSsubs) and FGP (FRESHLD) ≥ 50% | |
| Yes | ND |
| No | 1.2 |
| 1.2. FGP (CDSfresh) ≥ FGP(CWSfresh/CWSsubs) and MGT (CDSfresh) ≤ MGT (CWSfresh/CWSsubs) and FGP (CDSfresh) ≥ 50% | |
| Yes | PD, non-deep level |
| No | 1.3 |
| 1.3 FGP (FRESHLD) ≥ 50% or FGP (CDSfresh) ≥ 50% or FGP (CWSfresh/CWSsubs) ≥ 50% | |
| Yes | PD, intermediate level |
| No | PD, deep level |
| 2. MD/MPD | |
| 2.1. FGP (FRESHLD) ≥ 50% | |
| Yes | MD |
| No | MPD |
| 3. PY/PY + PD | |
| 3.1. FGP (FRESHLD) ≥ FGP(FRESHsc) and MGT (FRESHLD) ≤ MGT (FRESHsc) and FGP (FRESHLD) ≥ 50% | |
| Yes (assumption of impermeable seed coat dismissed!) | ND |
| No | 3.2 |
| 3.2. FGP (FRESHsc) ≥ 50% | |
| Yes | PY |
| No | PY + PD |
For unknown values of FGP or MGT the truth-value of the functional operation was assumed to become TRUE, except for the comparison of FGP with 50%, where missing values resulted in a FALSE.
FGP = final germination percentage; MGT = mean germination time; ND = non-dormant; PD = physiological dormancy; MD = morphological dormancy; MPD = morphophysiological dormancy; PY = physical dormancy; PY + PD = combinational dormancy; FRESHLD = seeds without storage under long-day conditions; CWSfresh = cold-wet storage; CWSsubs = cold-wet storage subsequent to a germination experiment; CDSfresh = cold-dry storage; FRESHsc = scarification of seeds without storage.