Table 4 Principal component analysis, co-heritability and correlation coefficient estimation of maize inbred lines for thirty-eight traits under irrigated condition.

From: Impact of water deficit stress in maize: Phenology and yield components

Traits	NDT				DT
Traits	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.

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Table 4 Principal component analysis, co-heritability and correlation coefficient estimation of maize inbred lines for thirty-eight traits under irrigated condition.

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