Table 3.
Structure matrices for discriminant factor 1 (DF1) and DF2 for volatile organic compounds (VOCs) from six cultivars of growth stage 1·1–1·2 oilseed rape (Brassica napus) seedlings
| VOC | DF1 | VOC | DF2 |
|---|---|---|---|
| Ucomp D | 0·233 | Ucomp B | 0·141 |
| Ucomp B | 0·188 | Ucomp D | 0·062 |
| Ucomp A | 0·042 | α-Pinene | 0·061 |
| α-Terpinene | 0·041 | δ-3-Carene | 0·056 |
| δ-3-Carene | 0·038 | Ucomp A | 0·044 |
| d-Limonene | 0·034 | Ucomp C | 0·037 |
| Umono C | 0·024 | β-Myrcene | 0·022 |
| γ-Terpinene | 0·024 | Ucomp F | 0·022 |
| α-Phellanderene | 0·022 | Umono B | 0·020 |
| Eucalyptol | 0·021 | α-Phellanderene | 0·016 |
| α-Pinene | 0·019 | Octadiene | 0·014 |
| Umono A | 0·017 | d-Limonene | 0·013 |
| Ucomp G | 0·017 | Acetone | 0·011 |
| ρ-Cymene | 0·011 | Anisole | 0·006 |
| Anisole | 0·011 | Umono C | 0·004 |
| Acetone | 0·010 | γ-Terpinene | −0·009 |
| β-Myrcene | 0·007 | Umono A | −0·011 |
| Ucomp F | 0·007 | ρ-Cymene | −0·012 |
| Umono B | 0·006 | Ucomp G | −0·012 |
| Ucomp C | 0·001 | Ucomp E | −0·015 |
| Octadiene | −0·006 | Eucalyptol | −0·030 |
| Ucomp E | −0·051 | 3-Hexen-1-ol | −0·052 |
| 3-Hexen-1-ol acetate | −0·069 | α-Terpinene | −0·058 |
| 3-Hexen-1-ol | −0·680 | 3-Hexen-1-ol acetate | −0·086 |
A more positive value (on a scale of 1 to −1) indicates a stronger positive correlation between that VOC and the DF; a more negative value indicates a negative correlation, while a value close to zero indicates little correlation.