Table 4.
Factorial analysis of variance showing F-statistics and associated probability values (F, p) for the effects of genotype (G), date of sowing (DOS), and their interaction (G x DOS) on plant infestation percentage and structural, photosynthetic and biochemical traits in sweet sorghum genotypes evaluated across three sowing dates under natural stem borer infestation during the kharif season 2024.
| Source | dF | PI (F,P) |
Hemicellulose (F,P) |
Cellulose (F,P) |
Lignin (F,P) |
PE (F,P) |
gS (F,P) |
iCO2 (F,P) |
TSS (F,P) |
Starch (F,P) |
R. Sugar (F,P) |
TPC (F,P) |
FAA (F, P) |
Phenol (F, P) |
Tannins (F, P) |
Saponin (F, P) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Genotypes (G) | 3 |
41.16, 0.0000 |
18.75, 0.0000 |
13.67, 0.0000 |
5.96, 0.0039 |
8.45, 0.0006 |
7.60, 0.0000 |
9.72, 0.0003 |
182.76, 0.0000 |
189.91, 0.0000 |
26.27, 0.0000 |
33.07, 0.0000 |
11.71, 0.0001 |
119.19, 0.0000 |
142.72, 0.0000 |
84.93, 0.0000 |
| Date of Sowing (DOS) | 2 |
24.75, 0.0000 |
3.16, 0.0064 |
6.46, 0.0062 |
4.74, 0.0019 |
41.13, 0.0000 |
13.53, 0.0001 |
8.90, 0.0015 |
66.36, 0.0000 |
3.26, 0.0404 |
22.63, 0.0000 |
23.36, 0.0000 |
23.00, 0.0000 |
98.91, 0.0000 |
73.01, 0.0000 |
58.87, 0.0000 |
| G x DOS | 6 |
0.86, 0.5406 |
0.06, 0.9991 |
1.12, 0.3817 |
0.58, 0.7396 |
2.35, 0.0660 |
1.55, 0.2076 |
1.55, 0.2095 |
2.34, 0.0672 |
17.61, 0.0000 |
0.13, 0.9911 |
0.90, 0.5107 |
1.30, 0.2964 |
0.65, 0.6889 |
1.87, 0.1322 |
1.26, 0.3144 |
Traits assessed include plant infestation (PI; %); structural cell wall components- hemicellulose, cellulose, and lignin (%); gas exchange parameters- photosynthetic rate (PE; µmol CO₂ m-2 s-1), stomatal conductance (gS; mol H₂O m-2 s-1), and intercellular CO₂ concentration (iCO₂; µmol mol-1); and biochemical parameters- total soluble sugars (TSS; mg g-1 FW), starch content (mg g-1 FW), reducing sugars (mg g-1 FW), total protein content (TPC; mg g-1 FW), free amino acids (FAA; mg g-1 FW), total phenolics (mg g-1 FW), condensed tannins (mg g-1 FW), and saponins (mg g-1 FW). Degrees of freedom for genotype (df = 3), date of sowing (df = 2), genotype x date of sowing interaction (df = 6), and error (df = 22) are presented. Bold values indicate statistical significance at p ≤ 0.05