## Results and Discussion
### Aroma-Active Volatiles of Cultivated Highbush Blueberries  
Among the five highbush cultivars evaluated in this study, a total of forty-two peaks were identified through GC-O analysis with MF values > 25% in at least one cultivar (Table 3). 'Duke', 'Brigitta', 'Jersey', 'Liberty' and 'Aurora' each had twenty-six, twenty-one, fourteen, twenty-two and twenty-eight aroma-active peaks, respectively. Eighteen of the identified compounds comprising these peaks were determined to be monoterpenoids, nine aldehydes, seven ketones, five alcohols, four branched-chain esters, one straight-chain ester, two acids, one hydrocarbon and one unknown. Differences in aroma-active compounds among the five highbush cultivars were substantial. Of the forty-two peaks identified through GC-O, only seven had MF values > 25% in all five cultivars and twelve peaks were detected by GC-O in only a single cultivar (Table 3). Similar differences in aroma-active compounds among four Southern highbush blueberry cultivars were reported, where twenty-four of forty-three aroma-active compounds were found in all four cultivars [10]. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multicolumn{6}{c}{**MF Value (\%)**} & \multicolumn{6}{c}{**Aroma Descriptors \({}^{2}\)**} & \multirow{2}{*}{**ID Basis \({}^{3}\)**} \\ \  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multicolumn{6}{c}{**MF Value (\%)**} & \multicolumn{6}{c}{**Aroma Descriptors 2**} & \multirow{2}{*}{**ID Basis 3**} \\ \cline{3-3} \cline{5-9}  & & **Duke** & **Briggita** & **Jersey** & **Liberty** & **Aurora** & **Ave** & & & \\ \hline  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multirow{2}{*}{**RI-Ref 2**} & \multirow{2}{*}{**Sim 3**} & \multicolumn{4}{c}{**Volatile Composition (Area Count)**} & \multicolumn{2}{c}{**F Prob 4**} & \multirow{2}{*}{**\%**} \\ \cline{6-13} \cline{6-13} \cline{11-13} \cline{  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{**Compound**} & \multicolumn{1}{c}{**RI**} & \multicolumn{1}{c}{**RI-Ref 2**} & \multicolumn{1}{c}{**Sim 3**} & \multicolumn{1}{c}{**Volatile Composition (Area County)**} & \multicolumn{1}{c}{**F Prob 4**} & \multicolumn{1}{c}{**\%**} \\ \hline Monoterpencids & & & & & & & & & & & & & & & \\ Linaled acetate & 1542 & 1540 & 902 & 48,358 & 8419 &  
\begin{table} \begin{tabular}{c c c c c c c c c c c c c} \hline \hline
**Compound** & **RI** & **RI-Ref 2** & **Sim 3** & \multicolumn{6}{c}{**Volatile Composition (Area Counts)**} & \multicolumn{1}{c}{**F Prob 4**} & \% \\ \cline{6-13}  & & & & **Duke** & **Brigita** & **Jersey** & **Liberty** & **Aurora** & **Mean** & **SEM** & \\ \hline Sulfur compounds & & & & & & & & & & & & \\ Dimethyl trisulfide & 1391 & 1390 & 903 & 3759 & – & – & – & – & 752 & 49 & \(<\)0.001 & 0.38 \\ Dimethyl disulfide & 1079 & 1069 & 944 & 2578 & – & – & – & – & 516 & 394 & \(<\)0.001 & 0.26 \\ Total & & & 637 & – & – & – & – & 1027 & 747 & \(<\)0.001 & 0.65 \\ Grand Total & & & 360,259 & 113,672 & 118,910 & 192,484 & 172,128 & 206,647 & 26,301 & \(<\)0.001 & 100 \\ \hline \hline \end{tabular}   
* Values are means of 2 harvests from 3 commercial fields for each cultivar (a = 6). Only compounds with an average relative abundance \(>\)0.05% are shown. 2 Reference RI values are the average of 3 more values from the NIST NIST NIST Database unless indicated otherwise. 3 RS Similarity values are the average of 3 samples unless indicated otherwise. Monoterpenoids were major contributors of \"floral\", \"sweet\", \"fruity\", \"citrus\" and \"blueberry\" aromas in fruit of the five highbush blueberry cultivars assessed in this study (Table 3). Of all the volatile compounds identified in these highbush fruits, monoterpenoids comprised, on average, over 25% of the total volatile content (Table 4).