Table 4.

Eigen values and percent of total variation and component matrix for the principal component axes—Drought stress.

Principal components	1	2	3	4	5	6	7	8
Eigen values	6.22	3.83	2.74	2.49	1.99	1.28	1.15	1.02
Proportion of variance	0.22	0.14	0.10	0.09	0.07	0.05	0.04	0.04
Cumulative	0.22	0.36	0.46	0.55	0.62	0.66	0.70	0.74
COMPONENT MATRIX
SCMR	0.012	−0.061	0.201	0.052	−0.058	−0.461	−0.361	0.453
LAI	0.157	−0.161	−0.145	−0.024	0.252	0.354	−0.131	0.012
CB	0.131	−0.274	−0.338	0.107	0.021	0.076	−0.240	0.254
PHI	−0.015	−0.157	0.001	0.482	0.094	−0.083	0.020	−0.100
PPI	0.044	0.065	−0.244	0.040	−0.070	0.059	0.362	0.444
HI	−0.059	0.014	0.229	0.295	0.094	−0.313	0.238	−0.413
SW	0.029	0.159	−0.408	−0.102	−0.109	−0.193	−0.063	−0.301
GY	0.114	−0.147	−0.271	0.345	0.016	−0.197	−0.265	−0.127
Shoot TNC	−0.068	−0.038	−0.267	0.180	−0.075	−0.089	−0.005	0.123
Seed TNC	0.016	−0.098	−0.150	0.270	−0.215	0.015	0.474	−0.038
PNA	0.045	−0.331	0.179	0.107	0.071	0.059	0.298	0.192
SNA	0.055	−0.379	0.189	0.288	0.057	−0.004	−0.005	0.117
DM	0.027	−0.167	0.365	−0.142	0.184	0.238	0.075	0.022
VRD Flowering	0.334	0.026	0.083	0.006	−0.251	−0.094	−0.027	−0.016
RL0–5	−0.107	0.264	0.069	−0.021	0.062	−0.253	0.170	0.268
RL5–10	0.169	0.272	−0.103	0.091	0.221	−0.058	0.152	0.218
RL10–20	0.251	0.196	−0.132	0.067	0.302	0.038	0.158	0.024
RL20–40	0.298	0.149	−0.035	0.072	0.236	0.035	−0.018	−0.013
RL40–60	0.330	0.042	0.168	0.028	0.130	−0.051	−0.034	−0.129
RL60–75	0.312	0.018	0.136	0.008	0.104	−0.053	−0.188	−0.074
TRL	0.310	0.228	0.034	0.050	0.264	−0.089	0.068	0.052
FRP0–5	−0.201	0.273	0.187	0.127	0.020	−0.084	−0.098	0.168
FRP5–10	−0.197	0.253	0.088	0.273	0.038	0.148	−0.210	0.050
FRP10–20	−0.195	0.217	0.053	0.311	0.084	0.285	−0.133	−0.009
FRP20–40	−0.170	0.193	−0.026	0.261	0.003	0.335	−0.081	0.003
FRP40–60	0.191	0.108	0.129	0.115	−0.415	0.004	0.080	−0.006
FRP60–75	0.290	0.059	0.077	0.025	−0.312	0.204	−0.073	0.032
TFRP	0.234	0.173	0.141	0.156	−0.406	0.215	−0.064	0.038

SCMR, SPAD chlorophyll meter readings; LAI, Leaf area index (m² m⁻²); CB, Canopy biomass (kg ha⁻¹); PHI, Pod harvest index (%); PPI, Pod partitioning index (%); HI, Harvest index (%); S100W, 100 seed weight (g); GY, Grain yield (kg ha⁻¹); Shoot TNC, Shoot TNC (mg g⁻¹); Seed TNC, Seed TNC (mg g⁻¹); PNA, Pod number per m²; SNA, Seed number per m²; DM, Days to maturity; VRD Flowering, Visual rooting depth at flowering (cm plant⁻¹); RL0–5, Root length at soil depth 0–5 cm (m plant⁻¹); RL5–10, Root length at soil depth 5–10 cm (m plant⁻¹); RL10–20, Root length at soil depth 10–20 cm (m plant⁻¹); RL20–40, Root length at soil depth 20–40 cm (m plant⁻¹); RL40–60, Root length at soil depth 40–60 cm (m plant⁻¹); RL60–75, Root length at soil depth 60–75 cm (m plant⁻¹); TRL, Total root length (m plant⁻¹); FRP0–5, Fine root proportion at soil depth 0–5 cm (%); FRP5–10, Fine root proportion at soil depth 5–10 cm (%); FRP10–20, Fine root proportion at soil depth 10–20 cm (%); FRP20–40, Fine root proportion at soil depth 20–40 cm (%); FRP40–60, Fine root proportion at soil depth 40–60 cm (%); FRP60–75, Fine root proportion at soil depth 60–75 cm (%); TFRP, Total fine root proportion (%).