Table II.
Morphological traits and characters and components in lower stems of Nipponbare and NILs
Data are expressed as means ± se of nine or more plants.
| Traits | Nipponbare | NIL43 | NIL60 | NIL63 |
|---|---|---|---|---|
| Traits related to plant type and yield | ||||
| Plant height (cm) | 106.0 ± 1.5 | 101.6 ± 1.4**a | 112.0 ± 1.0** | 115.8 ± 0.8** |
| -2 leaf height (cm) | 37.0 ± 0.8 | 35.7 ± 1.0 | 35.3 ± 1.4 | 39.1 ± 1.2 |
| Stem diameter (mm) | 3.8 ± 0.1 | 4.0 ± 0.1 | 4.0 ± 0.1 | 4.3 ± 0.1** |
| Stem no. | 17.4 ± 1.1 | 17.8 ± 1.1 | 16.9 ± 1.3 | 18.2 ± 1.2 |
| Crown width (mm) | 58.1 ± 1.7 (100%)c | 77.5 ± 3.4** (133%) | 67.8 ± 3.6* (117%) | 67.3 ± 2.6** (116%) |
| Yield (g plant-1) | 28.2 ± 1.6 | 28.3 ± 1.9 | 36.1 ± 3.6 | 31.1 ± 2.6 |
| Upper parts wt (g) | 16.8 ± 1.0 | 18.3 ± 1.0 | 16.7 ± 1.2 | 24.1 ± 1.9** |
| Characters of lower stems | ||||
| Wt (g) | 1.0 ± 0.1 (100%) | 1.5 ± 0.1** (150%) | 1.6 ± 0.1** (160%) | 2.1 ± 0.1** (210%) |
| Densityb (g cm-3) | 0.08 ± 0.00 (100%) | 0.10 ± 0.01** (125%) | 0.11 ± 0.01** (138%) | 0.12 ± 0.01** (150%) |
| Components in lower stems | ||||
| Starch (μmol hexose g-1 dry wt) | 131.4 ± 51.5 (100%) | 457.8 ± 122.2** (348%) | 659.2 ± 136.8** (502%) | 1,334.1 ± 178.9** (1,015%) |
| Suc (μmol hexose g-1 dry wt) | 320.5 ± 68.0 (100%) | 465.5 ± 44.3* (145%) | 505.3 ± 21.6* (158%) | 641.0 ± 25.5** (200%) |
| Hexoses (μmol hexose g-1 dry wt) | 66.3 ± 10.8 (100%) | 71.6 ± 4.8 (108%) | 89.8 ± 10.8 (135%) | 124.4 ± 10.1** (188%) |
| Silicon (counts s-1) | 41.0 ± 1.6 (100%) | 30.8 ± 2.0** (75%) | 34.4 ± 1.2* (84%) | 23.6 ± 2.1** (58%) |
a
**,**,*, Significant at 0.001, 0.01, and 0.05 at probability level, respectively. b Density of lower stem = lower stem wt/[π × (stem diameter/2)2 × stem length]. c Percentage relative to Nipponbare.