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

Table 6

Relative contribution (partial and model 𝑅²), 𝐹 value, and probability in predicting wheat grain yield by the stepwise procedure analysis under inoculation 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	—	0.9957	0.9957	<.0001	0.95104	0.01458	<.0001
2	𝑥6	—	0.0012	0.9969	0.0009	−0.99926	0.27170	0.0009
3	𝑥5	—	0.0003	0.9972	0.0809	0.01332	0.00549	0.0212
4	𝑥8	—	0.0003	0.9975	0.0445	−0.00472	0.00225	0.0445

X4: spike weight/plant, X5: grains/spike, X6: grain weight/spike and X8: total chlorophyll content of flag leaf.
𝑅² : coefficient of determination, 𝑃 value ER: 𝑃 value for entered or removed variables, and 𝑃 value 𝑀: 𝑃 value for final model.