Table 5.
Physiological and morphological trait means, standard errors, and results of ANOVA by type.
| Trait | Biomass sorghum Mean ± SEM | Grain sorghum Mean ± SEM | F-ratio | p | Adj. R2 |
|---|---|---|---|---|---|
| Plant height (cm) | 189.8 ± 6.828 | 121.6 ± 2.834 | 106.6 | < 0.0001 | 0.57 |
| Stem diameter (mm) | 12.2 ± 0.239 | 14.6 ± 0.437 | 13.43 | 0.0004 | 0.14 |
| Average Individual leaf area (mm2) | 323.2 ± 19.02 (276.5 ± 9.52)* | 300.7 ± 5.997 | 4.99 | 0.0287 | 0.01 |
| Panicle harvest index | 0.29 ± 0.022 | 0.4 ± 0.004 | 85.13 | < 0.0001 | 0.53 |
| Leaf harvest index | 0.26 ± 0.014 (0.23 ± 0.005)* | 0.2 ± 0.003 | 4.28 | 0.0423 | 0.01 |
| Stem harvest index | 0.45 ± 0.012 | 0.3 ± 0.004 | 122.5 | < 0.0001 | 0.62 |
| Growth rate, weeks 1–2 (cm/week) | 30.6 ± 2.249 | 18.4 ± 1.070 | 26.30 | < 0.0001 | 0.24 |
| Growth rate, weeks 3–4 (cm/week) | 21.4 ± 2.697 | 8.0 ± 0.971 | 29.25 | < 0.0001 | 0.27 |
| Ci/Ca | 0.297 ± 0.016 | 0.341 ± 0.009 | 6.44 | 0.0118 | 0.02 |
| gs (mmol H2O m−2s−1) | 0.134 ± 0.006 | 0.196 ± 0.006 | 57.25 | < 0.0001 | 0.20 |
| A (μmol CO2 m−2s−1) | 20.19 ± 0.730 | 28.36 ± 0.606 | 78.76 | < 0.0001 | 0.26 |
| WUE | 162.9 ± 4.083 | 150.3 ± 2.319 | 6.26 | 0.0131 | 0.02 |
| ChlA (mg/g) | 0.582 ± 0.025 | 0.632 ± 0.024 | 1.99 | 0.1648 | – |
| ChlB (mg/g) | 0.159 ± 0.008 | 0.168 ± 0.007 | 0.738 | 0.3942 | – |
| ChlT (mg/g) | 0.749 ± 0.033 | 0.810 ± 0.030 | 1.7173 | 0.196 | – |
| A/T | 0.777 ± 0.004 | 0.781 ± 0.004 | 0.4636 | 0.4991 | – |
| A/B | 3.716 ± 0.096 | 3.809 ± 0.080 | 0.5427 | 0.4647 | – |
*
Starred values calculated with 100M removed as an outlier. Ci/Ca = ratio of intercellular (leaf) [CO2]to ambient [CO2]; gs, stomatal conductance; A, photosynthesis; WUE, Water Use Efficiency; ChlA, B, Tot, Chlorophylls A, B, and Total, respectively; A/B and A/T, ratio of chlorophyll A to B and A to Total, respectively.