Table 7: Relative contribution (partial and model ), value, and probability in predicting wheat grain yield by the stepwise procedure analysis under noninoculation condition and different water levels.

StepVariables
entered
Variable
removed
Partial
Model
value ERParameter
estimate
Standard
error
value

1 0.99630.9963<.00010.97670.00947<.0001
2 0.00130.99750.0002−1.544410.21063<.0001
3 0.00050.9980.0088−0.010940.004600.0245
4 0.00040.99850.00600.012080.003420.0014
5 0.00020.99870.02610.005050.00160.0038
6 0.00020.99890.0169−0.004070.001380.0064
7 0.00010.99910.04750.097070.046820.0475

X4: spike weight/plant, X5: grains/spike, X6: grain weight/spike, X8: total chlorophyll content of flag leaf, X9: biological yield/plant, X10: root weight, and X11: leaves area.
: coefficient of determination, value ER: value for entered or removed variables, and value : value for final model.