Comparing Relationships among Yield and Its Related Traits in Mycorrhizal and Nonmycorrhizal Inoculated Wheat Cultivars under Different Water Regimes Using Multivariate Statistics

Table 7

Relative contribution (partial and model 𝑅²), 𝐹 value, and probability in predicting wheat grain yield by the stepwise procedure analysis under noninoculation condition and different water levels.

Step	Variables; entered	Variable; removed	Partial; 𝑅^2	Model; 𝑅^2	𝑃 value ER	Parameter; estimate	Standard; error	𝑃 value 𝑀
1	𝑥4	—	0.9963	0.9963	<.0001	0.9767	0.00947	<.0001
2	𝑥6	—	0.0013	0.9975	0.0002	−1.54441	0.21063	<.0001
3	𝑥9	—	0.0005	0.998	0.0088	−0.01094	0.00460	0.0245
4	𝑥5	—	0.0004	0.9985	0.0060	0.01208	0.00342	0.0014
5	𝑥11	—	0.0002	0.9987	0.0261	0.00505	0.0016	0.0038
6	𝑥8	—	0.0002	0.9989	0.0169	−0.00407	0.00138	0.0064
7	𝑥10	—	0.0001	0.9991	0.0475	0.09707	0.04682	0.0475

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.
𝑅²: coefficient of determination, 𝑃 value ER: 𝑃 value for entered or removed variables, and 𝑃 value 𝑀: 𝑃 value for final model.