Table 3 Trait loading scores of the selected root traits and the proportion of variation for each principal component under irrigated conditions
| Trait | Factor loadings | ||
|---|---|---|---|
| PC-1 | PC-2 | PC-3 | |
| FRL20 | 18.98 | 9.75 | 2.07 |
| TRL40 | 18.57 | 4.78 | 19.10 |
| TRL60 | 14.87 | 20.67 | 6.09 |
| BI40 | 3.33 | 36.56 | 3.00 |
| DIAM _ TR60 | 27.82 | 1.06 | 7.07 |
| \( {\upalpha}_{FR{L}_{40\_60}} \) | 0.94 | 26.71 | 29.39 |
| \( {RED}_{T{R}_{20_{60}}} \) | 15.49 | 0.48 | 33.26 |
| Eigenvalue | 3.09 | 1.95 | 1.25 |
| Percentage of variance (%) | 44.21 | 27.85 | 17.92 |
| Cumulative percentage of variance (%) | 44.21 | 72.07 | 89.98 |