Table 4: Path coefficient (direct and indirect effects) of the measured variables attributed on grain yield variation of wheat in noninoculation condition and different water levels.

VariablesEffects via Direct effect Indirect effect Y
X1X2X3X4X5X6X7X8X9X10X11

X1−0.004 −0.0030.0000.5030.018−0.03−0.006−0.017−0.0190.010.01−0.004 0.4710.467
X2−0.002−0.004 0.0000.4950.018−0.026−0.004−0.013−0.0190.0090.007−0.004 0.4690.465
X3−0.002−0.0020.001 0.6410.019−0.028−0.006−0.012−0.0180.0090.0130.001 0.6200.621
X4−0.002−0.0020.0001.013 0.018−0.037−0.005−0.012−0.0190.0120.0181.013 −0.020.993
X5−0.002−0.0030.0000.5760.032 −0.041−0.004−0.015−0.020.010.0160.032 0.5220.554
X6−0.002−0.0020.0000.5670.02−0.067 −0.003−0.008−0.0150.010.02−0.067 0.5910.524
X7−0.003−0.0020.0000.5790.016−0.026−0.008 −0.015−0.0150.0120.013−0.008 0.5630.555
X8−0.003−0.0020.0000.540.021−0.023−0.006−0.023 −0.0210.0090.011−0.023 0.5320.509
X9−0.003−0.0030.0000.7270.023−0.036−0.005−0.017−0.027 0.0110.013−0.027 0.7160.689
X10−0.002−0.0020.0000.6160.017−0.034−0.005−0.011−0.0150.020 0.0130.020 0.5810.601
X11−0.002−0.0010.0000.6730.018−0.048−0.004−0.01−0.0140.0090.028 0.028 0.6260.654

X1: tiller numbers/plant, X2: spike length, X3: spikelets/spike, X4: spike weight/plant, X5: grains/spike, X6: grain weight/spike, X7: 100-grain weight, X8: total chlorophyll content of flag leaf, X9: biological yield/plant, X10: root weight, and X11: leaves area.