Table 4.
Principal component analysis showing eigenvectors, eigenvalues, and percent variance of physiological and agronomic traits of 10 sugarcane genotypes under drought at the tillering stage.
| Parameters | PC1 | PC2 | PC3 | PC4 | PC5 |
|---|---|---|---|---|---|
| Chl | −0.4756 | 0.2322 | −0.4511 | 0.0602 | −0.1448 |
| AOA | 0.3644 | 0.2738 | 0.4555 | −0.4717 | −0.2302 |
| EC | 0.4218 | −0.4136 | −0.3497 | −0.0741 | 0.6024 |
| Gs | −0.3684 | −0.3487 | 0.3913 | −0.4275 | 0.2798 |
| Plant height | −0.4893 | −0.3525 | −0.0639 | −0.3564 | −0.0968 |
| Stalk diameter | −0.2025 | −0.1339 | 0.5552 | 0.6594 | 0.1998 |
| Internode length | −0.2165 | 0.6605 | 0.0358 | −0.1543 | 0.6600 |
| Tiller count | −0.4756 | 0.2322 | −0.4511 | 0.0602 | −0.1448 |
| Standard deviation | 1.526 | 1.317 | 1.201 | 0.952 | 0.479 |
| Proportion of variance, % | 33.3 | 24.8 | 20.6 | 13.0 | 3.3 |
| Cumulative proportion, % | 33.3 | 58.1 | 78.6 | 91.6 | 94.8 |