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Table 2 Variable loading scores of 16 selected global traits (12 root-related and four shoot traits) and the proportion of variation of each principal component

From: Phenotypic variability in bread wheat root systems at the early vegetative stage

TraitPC1PC2PC3PC4PC5
SRLZ10.600.670.03−0.210.21
SRLZ20.520.660.06−0.070.06
MRD0.620.720.04−0.180.18
SRN0.26−0.360.42−0.250.09
RL0.890.020.030.370.20
RD−0.34−0.53−0.09−0.020.36
SRL−0.340.500.380.65−0.14
RLI0.59−0.500.010.550.10
RTD0.46−0.22−0.25−0.69−0.19
RM0.93− 0.18− 0.150.050.25
SM0.91−0.240.20− 0.02− 0.08
TDM0.95−0.220.060.010.05
RMR−0.190.07−0.700.140.54
SH0.34−0.220.73−0.090.13
LN0.59−0.01−0.350.14−0.55
TN0.71−0.05−0.390.23−0.28
Variation proportion     
Eigenvalue6.282.571.751.571.08
Variance (%)39.316.211.09.86.7
Cumulative variability (%)39.355.566.576.383.0
  1. Rotation converged in 25 iterations using Varimax with Kaiser normalization. For each trait, the large variable loading score crossing the six components appears in bold. Three principal components with eigenvalues > 1 were extracted and considered significant (Tabachnik and Fidell, 1996)
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