## 3 Results
### Volatile Compounds
For the green fruit, the first two variables accounted for 98% of total variability (Table 5), which thus indicates that the multivariate structure of the VOC could be well represented by only the first two canonical variables. This was confirmed by the scatter plot of canonical_1 \(\times\) canonical_2 (Figure 5), which allowed the segregation of the six groups. Instead, for the red fruit, only the first canonical variable \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{2}{c}{**Ripening Level**} & \multirow{2}{*}{**SEM**} & \multirow{2}{*}{**\(p\) Value**} & \multicolumn{4}{c}{**Landrace**} & \multirow{2}{*}{**SEM**} & \multirow{2}{*}{**\(p\) Value**} \\ \cline{1-1} \cline{5-10}  & & **Green** & & & & **“Cuemo”** & & & **“Sueca”** & **“Valencia”** \\ \hline \multicolumn{10}{c}{_terpenes_} \\ \hline
2-propenyldiene-1- & \multirow{2}{*}{0.04} & 0.79 & 0.11 & *** & 0.07 B & 0.45 B & 0.73 A & 0.14 & ** \\ cyclobutene & \multirow{2}{*}{75.05} & \multirow{2}{*}{0.13} & \multirow{2}{*}{12.61} & *** & 26.45 & 39.96 & 46.35 & 15.45 & ns \\
3-carene & & & & & & & & & \\ beta-trans-ocimene & 0.11 & 0.05 & 0.05 & ns & 0.05 & 0.12 & 0.07 & 0.06 & ns \\
7-methyl-1-octene & 0.60 & 0.09 & 0.07 & *** & 0.44 & 0.28 & 0.31 & 0.09 & ns \\ Allo-ocimene & 1.66 & 0.03 & 0.28 & *** & 0.55 & 0.92 & 1.06 & 0.34 & ns \\ copene & 11.95 & 2.69 & 2.10 & * & 7.93 & 10.18 & 3.86 & 2.57 & ns \\ cyclosativene & 1.46 & 0.48 & 0.25 & * & 1.12 & 1.22 & 0.57 & 0.31 & ns \\ \(\beta\)-linalool & 5.70 & 1.50 & 0.62 & *** & 1.44 B & 3.79 A & 5.55 A & 0.76 & ** \\ \(\alpha\)-santalene & 0.62 & 0.05 & 0.11 & *** & 0.57 A & 0.35 A & 0.09 B & 0.13 & * \\ \(\alpha\)-Bergamonte & 9.53 & 0.57 & 1.69 & *** & 7.74 & 5.08 & 2.34 & 2.06 & ns \\ \(\beta\)-farnesene & 2.28 & 0.39 & 0.34 & *** & 1.99 & 1.16 & 0.86 & 0.42 & ns \\ \hline \multicolumn{10}{c}{_esters_} \\ \hline
0.34 & 0.16 & 0.07 & ns & 0.40 & 0.20 & 0.14 & 0.09 & ns \\ n-octyl formate & 0.00 & 0.04 & 0.02 & ns & 0.05 & 0.00 & 0.01 & 0.03 & ns \\ methyl salicate & 24.80 & 4.83 & 4.28 & ** & 12.50 & 21.41 & 10.54 & 5.24 & ns \\ ethyl salicate & 1.69 & 0.09 & 0.33 & ** & 1.72 A & 0.93 A & 0.02 B & 0.41 & * \\ ethyl hexadecanoate & 0.50 & 0.07 & 0.11 & ** & 0.49 & 0.15 & 0.23 & 0.13 & ns \\ \hline \multicolumn{10}{c}{_aromatic_} \\ \multicolumn{10}{c}{_hydrocarbons_} \\ \hline o-xylene & 0.03 & 0.01 & 0.01 & ns & 0.01 & 0.02 & 0.03 & 0.01 & ns \\ mestilylene & 0.05 & 0.11 & 0.03 & ns & 0.05 & 0.13 & 0.06 & 0.04 & ns \\
2,4,6-trimethylanisole & 1.92 & 0.09 & 0.28 & *** & 0.80 & 1.48 & 0.74 & 0.34 & ns \\ \hline \multicolumn{10}{c}{_furans_} \\ \hline furan,2,3-dihydro- & \multirow{2}{*}{0.70} & \multirow{2}{*}{0.37} & \multirow{2}{*}{0.10} & \multirow{2}{*}{*} & \multirow{2}{*}{0.31 B  } \\ \multicolumn{10}{c}{4-methyl} \\ \multicolumn{10}{c}{2-pentylfuran} \\ \hline
**_miscellaneous_** & \multirow{2}{*}{1.00} & \multirow{2}{*}{0.34} & \multirow{2}{*}{0.14} & *** & 0.51 & 0.69 & 0.81 & 0.17 & ns \\
**N-methylpyrrole & 0.40 & 0.32 & 0.07 & ns & 0.38 & 0.41 & 0.29 & 0.09 & ns \\
**2-Isobutyl-3- & \multirow{2}{*}{37.11} & \multirow{2}{*}{3.07} & \multirow{2}{*}{3.15} & *** & 18.84 & 23.01 & 18.42 & 3.86 & ns \\ methoxypyrazine & & & & & & & & \\ carbon disulfide & 0.41 & 0.42 & 0.12 & ns & 0.42 & 0.49 & 0.35 & 0.12 & ns \\ \hline \hline \end{tabular}
\end{table} 
Table 4: _Cont._represented the multivariate structure by explaining 96% of variance (Table 5). Figure 6 demonstrates the discrimination effect of this canonical variable. For the green fruit, the canonical_1 variable markedly separated landraces. This separation was particularly evident for the grafted landraces (\"Cuerno\" scored higher than \"Valencia,\" while \"Sueca\" was intermediate between both). The ungrafted ones were almost indistinguishable according to canonical_1, with a short, but significant, distance between them (Figure 5). The original variables, which accounted mostly for this discrimination, were allo-ocimene and cyclosativene (Table 5).