Table 3. Multivariate regression fitted model to study relationship between physiological, grain quality traits, yield of spring wheat and treatments.
| Analysis of Variance | |||||||
|---|---|---|---|---|---|---|---|
| Parameters | Fitted model | R 2 | SOS | Df | MS | F-Ratio | P-Value |
| SPAD | SPAD = 65.7067–9.11189*Y—0.283708*G—0.159792*L—0.345292*SD | 76 | 7583.68 | 4 | 1895.92 | 171.68 | ** |
| SPAD = 119.132–0.176165*DG—21.4667*GA—0.982818*GP—1.40697*GY—0.0660608*PL—0.605003*SDS | 89 | 5585.52 | 6 | 930.919 | 55.52 | ** | |
| Proline | PL = 3.24983 + 8.47778*Y—1.54604*G + 7.29046*L + 1.51883*SD | 91 | 21459.3 | 4 | 5364.83 | 867.59 | ** |
| PL = -1.15692–2.91248*DG + 15.4017*GA + 3.65427*GP—2.31578*GY—0.35528*SDS—0.0606331*SPAD | 87 | 18222.2 | 6 | 3037.04 | 197.35 | ** | |
| Grain Protein | GP = 8.29847 + 1.0275*Y + 0.691375*G + 0.47075*L + 0.264611*SD | 55 | 313.337 | 4 | 78.3342 | 107.41 | ** |
| GP = 9.96677 + 0.643904*DG—3.39538*GA—0.304698*GY + 0.0646317*PL + 0.121606*SDS—0.0159545*SPAD | 83 | 476.168 | 6 | 79.3613 | 291.58 | ** | |
| Dry Gluten | DG = 6.01536–1.04678*Y + 1.69704*G—0.0810833*L—0.0247222*SD | 87 | 791.823 | 4 | 197.956 | 598.52 | ** |
| DG = -3.45383 + 2.93127*GA + 1.0661*GP + 0.188516*GY—0.0852876*PL—0.200735*SDS—0.00473487*SPAD | 83 | 750.159 | 6 | 125.026 | 277.44 | ** | |
| Grain ash | GA = 1.27967 + 0.103389*Y + 0.0283333*G + 0.0344167*L + 0.0195556*SD | 32 | 1.71432 | 4 | 0.42858 | 40.97 | ** |
| GA = 2.67121 + 0.0423568*DG—0.0812334*GP—0.0564484*GY + 0.00651719*PL + 0.000539882*SDS—0.00833723*SPAD | 56 | 3.12882 | 6 | 0.52147 | 80.08 | ** | |
| SDS | SDS = 14.7226 + 7.31739*Y—1.55571*G + 0.690875*L + 0.239833*SD | 56 | 5555.8 | 4 | 1388.95 | 113.99 | ** |
| SDS = 24.5835–2.77647*DG + 0.516773*GA + 2.78484*GP + 0.0764933*GY—0.143901*PL—0.224914*SPAD | 78 | 7681.05 | 6 | 1280.17 | 205.38 | ** | |
| Grain Yield | GY = 6.49562–1.15393*Y—0.0171375*G—0.784942*L—0.310326*SD | 64 | 337.121 | 4 | 84.2802 | 155.19 | ** |
| GY = 15.9924–0.0338893*SPAD + 0.00495613*SDS + 0.168942*DG—3.50084*GA—0.452101*GP—0.0607727*PL | 74 | 387.355 | 6 | 64.5592 | 159.86 | ** |
Note: * and ** are significant at 0.05 and 0.01 probability levels, respectively; ns = non-significant; SOS = sum of square; MS = mean square Df = degree of freedom
Y = Years; G = Genotypes = Locations; SD = Sowing dates; PL = Proline; DG = dry gluten; GA = Grain ash; GP = Grain protein; GY = Grain yield