Table 7.

Eigenvalues for different traits and the two major principal components with percentage variation under the different treatments.

	No stress (A)		Heat stress (B)		Heat-drought stress (C)
	PCA1	PCA2	PCA1	PCA2	PCA1	PCA2
Grain yield	0.03	0.02	0.03	0.01	0.03	0.02
Harvest index	0.15	0.32	0.31	0.31	0.19	0.87
Hundred seed weight	0.01	0.01	0.01	0.01	0.02	0.02
Filled pods per plant	0.98	−0.05	0.93	−0.25	0.97	−0.18
Unfilled pods per plants	−0.03	0.07	−0.15	–0.92	−0.12	–0.31
Zinc content	−0.01	0.20	−0.07	−0.03	0.04	−0.09
Crude protein	0.01	0.01	−0.01	0.02	0.01	0.03
Iron content	0.01	0.93	−0.02	−0.04	0.08	–0.33
Percentage variation (%)	74.4	13.6	62.2	17.6	73.0	11.3

PCA1, First Principal Component Analysis; PCA2, Second Principal Component Analysis.