Table 4.
Principal component analysis, co-heritability and correlation coefficient estimation of maize inbred lines for thirty-eight traits under irrigated condition.
| Traits | NDT | DT | ||||||
|---|---|---|---|---|---|---|---|---|
| PCA-1 (TV = 29.04%) | PCA-2 (TV = 17.80%) | Co-h2 | R2 | PCA-1 (TV = 54.4%) | PCA-2 (TV = 44.3%) | Co-h2 | R2 | |
| DA | 0.23 | 0.15 | 0.32 | 0.00 | −0.18 | −0.15 | 0.95 | −0.11 |
| DS | 0.25 | 0.11 | 0.99 | 0.00 | −0.17 | −0.16 | 0.93 | −0.07 |
| ASI | 0.12 | −0.22 | 0.98 | −0.34 | 0.22 | 0.03 | 0.98 | 0.57 |
| DDH | 0.25 | 0.07 | 0.98 | 0.00 | −0.05 | −0.24 | 0.09 | 0.12 |
| PH | 0.14 | 0.23 | 0.99 | 0.00 | 0.15 | −0.18 | 0.99 | 0.19 |
| NL | 0.21 | 0.11 | 0.99 | −0.22 | −0.02 | −0.24 | 0.91 | 0.17 |
| SU | −0.15 | −0.13 | 0.98 | 0.02 | 0.22 | 0.02 | 0.99 | −0.51 |
| SL | −0.05 | −0.19 | 0.99 | −0.02 | 0.22 | 0.00 | 0.99 | 0.02 |
| LA-3 | −0.25 | 0.06 | 0.97 | 0.25 | 0.07 | −0.23 | 0.99 | 0.35 |
| LA-C | −0.22 | 0.10 | 0.96 | 0.05 | −0.07 | −0.23 | 0.99 | 0.07 |
| INL 3–4 | −0.09 | 0.13 | 0.98 | 0.14 | 0.20 | 0.10 | 0.85 | 0.27 |
| FLL | −0.04 | −0.19 | 0.46 | −0.01 | −0.22 | 0.05 | 0.97 | −0.34 |
| FLW | 0.01 | −0.32 | 0.94 | −0.18 | −0.08 | −0.23 | 0.61 | 0.04 |
| EH | 0.17 | 0.10 | 0.99 | −0.26 | 0.01 | −0.24 | 0.93 | 0.35 |
| EL | 0.00 | 0.32 | 0.98 | 0.15 | 0.22 | −0.05 | 0.98 | 0.86 |
| EW | −0.11 | −0.01 | 0.87 | 0.03 | 0.21 | −0.09 | 0.94 | 0.96 |
| H/C | −0.25 | 0.07 | 0.99 | 0.27 | 0.22 | 0.01 | 0.81 | 0.66 |
| C/P | −0.07 | 0.03 | 0.43 | −0.01 | 0.13 | 0.20 | 0.43 | 0.01 |
| KR | 0.09 | 0.23 | 0.99 | 0.06 | 0.04 | −0.24 | 0.99 | 0.47 |
| KR/C | 0.17 | 0.15 | 0.92 | −0.04 | 0.05 | 0.24 | 0.95 | −0.14 |
| SW | 0.06 | 0.08 | 0.96 | 0.02 | −0.22 | −0.04 | 0.85 | −0.94 |
| KISTI | −0.17 | 0.22 | 0.96 | 0.87 | 0.18 | −0.14 | 0.97 | 0.99 |
| YI | −0.16 | 0.21 | 0.96 | 0.99 | 0.19 | −0.13 | 0.98 | 1.00 |
| RLWC | −0.02 | 0.13 | 0.95 | 0.06 | 0.21 | 0.09 | 0.97 | 0.30 |
| SG | 0.11 | 0.25 | 0.89 | 0.01 | 0.22 | −0.01 | 0.97 | 0.72 |
| LS | 0.15 | −0.29 | 0.91 | 0.02 | 0.21 | −0.09 | 0.94 | −0.35 |
| LR | 0.01 | −0.15 | 0.78 | 0.17 | −0.01 | 0.24 | 0.99 | 0.62 |
| LF | −0.18 | −0.04 | 0.00 | 0.19 | 0.22 | 0.02 | 0.92 | −0.43 |
| PS% | −0.07 | −0.16 | 0.97 | −0.42 | −0.22 | −0.06 | 0.83 | 0.00 |
| TB | −0.23 | −0.03 | 0.98 | 0.01 | −0.21 | 0.09 | 0.89 | −0.44 |
| BP | 0.05 | −0.19 | 0.98 | −0.42 | 0.13 | 0.20 | 0.82 | 0.00 |
| NBR | 0.26 | −0.02 | 0.97 | −0.30 | 0.16 | −0.17 | 0.96 | 0.96 |
| RFW | 0.18 | 0.04 | 0.81 | −0.07 | −0.09 | −0.22 | 0.91 | 0.04 |
| RDW | 0.20 | −0.06 | 0.94 | −0.21 | 0.03 | −0.24 | 0.99 | 0.44 |
| RL | 0.16 | −0.09 | 0.93 | 0.02 | −0.08 | 0.22 | 0.93 | −0.69 |
| RV | 0.18 | −0.25 | 0.96 | −0.69 | 0.22 | −0.02 | 0.94 | 0.76 |
| RN | 0.27 | 0.01 | 0.98 | −0.19 | 0.06 | −0.23 | 0.98 | 0.59 |
PCA: Principal component analysis; Co-h2: Co-heritability; r2: regression coefficient; TV = total variance explained; DA: Days to 50% tasseling; DS: Days to 50% silking; ASI: Anthesis silk interval; DDH: Days to 75% dry husk; PH: Plant height; NL: Number of leaves per plant; SU: Number of stomata on upper surface of leaf; SL: Number of stomata on lower surface of leaf; LA-3: 3rd leaf angle from top; LA-C: Leaf angle at ear forming node; INL3–4: Internodal length between 3rd and 4th leaf from top; FLL: Flag leaf length; FLW: Flag leaf width; EH: Ear height; EL: Ear length; EW: Ear width; H/C: Number of husk per ear; C/P: Number of ear per plant; K/R: Number of kernels per rows; KR/C: Number of kernel rows per ear; SW: 1000 seed weight; GY/ha: Grain yield per hectare; KiSTI: Modified stress tolerance index; YI: Yield index; RLWC: Relative leaf water content; SG: Stay green; LS: Leaf senescence; LR: Leaf rolling; LF: Leaf firing; PS%: Pollen stainability; TB: Tassel blast and BP: Bareness percentage; NBR: Number of brace root per plant; RFW: Root fresh weight; RDW: Root dry weight; RL: Root length; RV: Root volume; RN: Number of roots >10 cm.