Table 4.
Agronomic characteristics of intergeneric hybrids between modern sugarcane cultivar and E. arundinaceus.
| Characteristic | NiF8 | JW4 | Mid- parent value | Intergeneric hybrids | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Sugarcane (Female) | Erianthus (Male) | Mean (n = 32) | SD (n = 32) | Min (n = 32) | Max (n = 32) | h2 (n = 23) | CVg (n = 23) | P (n = 23) | ||
| Dry matter yield (g/stool) | 1621.9 | 1419.3 | 1520.6 | 591.0 | 512.0 | 40.3 | 1713.2 | 0.79 | 68.6 | *** |
| Millable stalk weight (g/stool) | 2766.7 | 1165.6 | 1966.2 | 783.3 | 748.1 | 48.5 | 2446.9 | 0.73 | 74.7 | *** |
| Number of stalks (no./stool) | 6.4 | 43.4 | 24.9 | 10.8 | 5.3 | 1.0 | 22.1 | 0.74 | 40.2 | *** |
| Stalk length (cm) | 119.5 | 64.8 | 92.2 | 67.6 | 31.9 | 15.0 | 125.8 | 0.80 | 39.5 | *** |
| Stalk diameter (mm) | 21.8 | 10.7 | 16.2 | 12.1 | 2.6 | 5.9 | 16.6 | 0.79 | 17.4 | *** |
| Single stalk weight (g) | 949.8 | 262.0 | 605.9 | 252.9 | 169.5 | 51.2 | 644.1 | 0.91 | 57.9 | *** |
| Juice brix (%) | 18.8 | 6.8 | 12.8 | 14.1 | 2.2 | 10.6 | 18.6 | 0.71 | 12.8 | *** |
| Sucrose (%) | 17.8 | 3.1 | 10.4 | 8.5 | 2.8 | 2.3 | 18.0 | 0.52 | 20.4 | *** |
| Reducing sugar (%) | 1.0 | 2.3 | 1.7 | 2.3 | 1.0 | 0.5 | 4.1 | 0.26 | 26.8 | *** |
| Sucrose/reducing sugar ratio (%) | 94.9 | 56.5 | 75.7 | 77.6 | 11.4 | 49.6 | 95.6 | 0.46 | 10.6 | *** |
| Fiber (%) | 10.2 | 23.4 | 16.8 | 16.7 | 3.3 | 8.0 | 22.4 | 0.64 | 15.1 | *** |
Mean, SD, Min, and Max of the measured agronomic characteristics were calculated using data for the 32 hybrids tested. h2 and CVg were obtained using data for the 23 hybrids for which three replicates were available.
Dry matter yield = total fresh weight × dry matter ratio.
Millable stalk weight = total fresh weight × millable stalk ratio.
Sucrose/reducing sugar ratio = (sucrose content/(sucrose content + reducing sugar content)) × 100.
Fiber content = (bagasse dry weight − (bagasse fresh weight − bagasse dry weight) × Juice brix% (100 −Juice brix%))/500 × 100.
CVg, genetic coefficient of variance; h2, heritability; Max, maximum value; Min, minimum value; SD, standard deviation.
***Significant difference at P < 0.001 among intergeneric hybrids.