## 2 Results and Discussion
### Volatile Compounds
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Compound** & **RExp * & **RINST ** & **Canada Giant** & **Ferrovia** & **Lapins** & **Skeena** \\ \hline
**Carbonyl Compounds** & & & 21.48 & 34.62 & 14.75 & 26.47 \\ Acetaldehyde & \(<\)500 & 408 & \(3.96^{\text{B}}\pm 1.68\)** & \(5.55^{\text{D}}\pm 0.54\) & \(5.27^{\text{C}}\pm 0.21\) & \(2.27^{\text{A}}\pm 0.34\) \\
2-Propanone & \(<\)500 & 500 & \(14.15^{\text{C}}\pm 6.45\) & \(15.12^{\text{D}}\pm 2.22\) & \(5.15^{\text{A}}\pm 1.94\) & \(8.18^{\text{B}}\pm 3.68\) \\ Hexanal & 801 & 798 & \(0.71^{\text{B}}\pm 0.43\) & \(2.72^{\text{D}}\pm 0.19\) & \(0.62^{\text{A}}\pm 0.31\) & \(2.18^{\text{C}}\pm 1.16\) \\
2-Hexenal & 856 & 859 & \(2.16^{\text{A}}\pm 1.42\) & \(10.36^{\text{C}}\pm 0.18\) & \(2.60^{\text{B}}\pm 1.62\) & \(10.39^{\text{C}}\pm 6.31\) \\
2,4-Hexadienal & 916 & 916 & n.d. & \(0.29^{\text{A}}\pm 0.03\) & n.d. & \(0.43^{\text{B}}\pm 0.25\) \\ Benzaldehyde & 974 & 973 & \(0.45^{\text{A}}\pm 0.07\) & \(0.50^{\text{B}}\pm 0.13\) & \(1.06^{\text{C}}\pm 0.34\) & \(2.95^{\text{D}}\pm 0.41\) \\ Nonanal & 1108 & 1103 & \(0.05^{\text{A}}\pm 0.00\) & \(0.08^{\text{B}}\pm 0.01\) & \(0.05^{\text{A}}\pm 0.03\) & \(0.07^{\text{B}}\pm 0.01\) \\
**Alcohols** & & & 9.97 & 5.56 & 7.72 & 22.21 \\ Ethanol & \(<\)500 & 427 & \(7.99^{\text{D}}\pm 1.29\) & \(3.59^{\text{A}}\pm 0.61\) & \(6.66^{\text{B}}\pm 0.39\) & \(6.98^{\text{C}}\pm 1.04\) \\
2-Butanol & 600 & 608 & \(0.08^{\text{A}}\pm 0.05\) & \(0.09^{\text{B}}\pm 0.06\) & n.d. & n.d. \\
3-Methyl-3-buten-1-ol & 731 & 724 & \(0.12^{\text{B}}\pm 0.01\) & \(0.16^{\text{C}}\pm 0.01\) & \(0.13^{\text{B}}\pm 0.00\) & \(0.85^{\text{A}}\pm 0.23\) \\
3-Methyl-butan-1-ol & 733 & 743 & \(0.11^{\text{A}}\pm 0.02\) & n.d. & n.d. & \(0.32^{\text{B}}\pm 0.09\) \\
3-Methyl-2-buten-1-ol & 772 & 770 & \(0.13^{\text{A}}\pm 0.02\) & \(0.20^{\text{C}}\pm 0.01\) & \(0.15^{\text{B}}\pm 0.02\) & \(0.96^{\text{D}}\pm 0.26\) \\
2-Hexen-1-ol & 864 & 865 & \(1.02^{\text{B}}\pm 0.20\) & \(1.04^{\text{B}}\pm 0.64\) & \(0.78^{\text{A}}\pm 0.55\) & \(7.57^{\text{C}}\pm 1.48\) \\
1-Hexanol & 867 & 870 & \(0.53^{\text{A}}\pm 0.37\) & \(0.49^{\text{A}}\pm 0.34\) & n.d. & \(2.25^{\text{B}}\pm 0.37\) \\ Benzyl Alcohol & 1045 & 1045 & n.d. & n.d. & n.d. & \(3.29\pm 1.15\) \\
**Other Compounds** & & & & & & \\
2-Hexenyl acetate & 1012 & 1014 & \(0.08^{\text{A}}\pm 0.07\) & n.d. & n.d. & \(0.13^{\text{B}}\pm 0.08\) \\
2-Methyl-1,3-butadiene & 508 & 520 & n.d. & n.d. & \(0.28^{\text{A}}\pm 0.09\) & \(0.66^{\text{B}}\pm 0.17\) \\ d-Limonene & 1044 & 1039 & \(0.03^{\text{A}}\pm 0.01\) & \(0.06^{\text{B}}\pm 0.01\) & \(0.04^{\text{A}}\pm 0.01\) & n.d. \\ \hline \hline \end{tabular} I.S. = internal standard; * R\({}_{\text{EXP}}\) = Retention Index experimentally determined data; ** R\({}_{\text{INST}}\) = Retention Index literature data NIST 05; *** Mean of tree repetitions is reported; n.d. = not detected; A-D different capital letters within a given row indicate significant differences (\(p<0.05\)) as observed by [PERSON]’s multiple comparison tests.  
\end{table} 
Table 2: Identification and semi—quantification of volatile compounds (data are expressed as \(\upmu\)g of I.S./kg fruit). The most representative compounds in the Skeena cultivar were C\({}_{6}\) and aromatic compounds. Total alcohols or specifically 2-hexen-1-ol, 1-hexanol, benzyl alcohol and benzaldehyde may differentiate the Skeena cultivar. Likewise, total carbonyls may differentiate the Lapins cultivar from the rest of the cultivars. Furthermore, hexanal and 2-hexenal may differentiate Ferrovia and Skeena from the other 2 cultivars. [PERSON] and [PERSON] [16] studied the volatiles of 12 sweet cherry cultivars using dynamic headspace GC and reported that of the 50 compounds identified, (_E_)-2-hexenol, benzaldehyde, hexanal and (_E_)-2-hexanal were predominant flavour volatiles which could be used to differentiate commercial and new cherry selections into various subgroups.