Table 2.
Correlation coefficients among various root traits measured in the present study
| Traits | TRTL | RFW | TRL | SA | AD | RV | LAD | TERN | TERL | L3 | SA3 | PA3 | V3 | T2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TRTL | 1 | |||||||||||||
| RFW | -.199* | 1 | ||||||||||||
| TRL | .478** | .005 | 1 | |||||||||||
| SA | .420** | .285** | .897** | 1 | ||||||||||
| AD | -.324** | .421** | -.509** | -.147 | 1 | |||||||||
| RV | .239** | .531** | .518** | .832** | .327** | 1 | ||||||||
| LAD | -.346** | .479** | -.504** | -.138 | .792** | .342** | 1 | |||||||
| TERN | .132 | .152 | .741** | .682** | -.338** | .412** | -.314** | 1 | ||||||
| TERL | .308** | .176* | .824** | .799** | -.317** | .532** | -.307** | .924** | 1 | |||||
| RDL3 | .241** | .389** | .137 | .482** | .466** | .739** | .477** | .029 | .157 | 1 | ||||
| RDSA3 | .230** | .399** | .131 | .474** | .478** | .738** | .486** | .022 | .148 | .999** | 1 | |||
| RDV3 | .130 | .361** | .100 | .413** | .436** | .661** | .457** | .066 | .133 | .855** | .857** | .853** | 1 | |
| RDT2 | .421** | -.052 | .165* | .220** | .010 | .186* | -.083 | -.141 | .022 | .351** | .344** | .340** | .272** | 1 |
Correlations were performed using 160 RI lines of the population. Data used were the means of four replications of independent measurements. Pairwise correlation coefficients were significant at the *5% or **1% significance level.
TRTL, Tap root length (cm); RFW, Root fresh weight (g); TRL, Total root length (cm); SA, Surface area (cm2); AD, Average diameter (mm); RV, Root volume (cm3); LAD, Lateral average diameter (mm); TERN, Tertiary root number; TERL, Tertiary root length (cm); RDL3, Root distribution in length classification 3 (1.0–1.5 mm); RDSA3, Root distribution in surface area classification 3 (1.0–1.5 mm); RDV3, Root distribution in volume classification 3 (1.0–1.5 mm); RDT2, Root distribution in thickness classification 2 (0.5–1.0 mm).