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

BMC Plant Biology

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

Trait	PC1	PC2	PC3	PC4	PC5
SRLZ1	0.60	0.67	0.03	−0.21	0.21
SRLZ2	0.52	0.66	0.06	−0.07	0.06
MRD	0.62	0.72	0.04	−0.18	0.18
SRN	0.26	−0.36	0.42	−0.25	0.09
RL	0.89	0.02	0.03	0.37	0.20
RD	−0.34	−0.53	−0.09	−0.02	0.36
SRL	−0.34	0.50	0.38	0.65	−0.14
RLI	0.59	−0.50	0.01	0.55	0.10
RTD	0.46	−0.22	−0.25	−0.69	−0.19
RM	0.93	− 0.18	− 0.15	0.05	0.25
SM	0.91	−0.24	0.20	− 0.02	− 0.08
TDM	0.95	−0.22	0.06	0.01	0.05
RMR	−0.19	0.07	−0.70	0.14	0.54
SH	0.34	−0.22	0.73	−0.09	0.13
LN	0.59	−0.01	−0.35	0.14	−0.55
TN	0.71	−0.05	−0.39	0.23	−0.28
Variation proportion
Eigenvalue	6.28	2.57	1.75	1.57	1.08
Variance (%)	39.3	16.2	11.0	9.8	6.7
Cumulative variability (%)	39.3	55.5	66.5	76.3	83.0

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)

ISSN: 1471-2229