Multiclass sample classification and marker selection are cutting-edge problems in metabolomics. In the present study we address the classification of 14 raspberry cultivars having different levels of gray mold (Botrytis cinerea) susceptibility. We characterized raspberry cultivars by two headspace analysis methods, namely solid-phase microextraction/gas chromatography–mass spectrometry (SPME/GC–MS) and proton transfer reaction-mass spectrometry (PTR-MS). Given the high number of classes, advanced data mining methods are necessary. Random Forest (RF), Penalized Discriminant Analysis (PDA), Discriminant Partial Least Squares (dPLS) and Support Vector Machine (SVM) have been employed for cultivar classification and Random Forest-Recursive Feature Elimination (RF-RFE) has been used to perform feature selection. In particular the most important GC–MS and PTR-MS variables related to gray mold susceptibility of the selected raspberry cultivars have been investigated. Moving from GC–MS profiling to the more rapid and less invasive PTR-MS fingerprinting leads to a cultivar characterization which is still related to the corresponding Botrytis susceptibility level and therefore marker identification is still possible

Cappellin, L.; Aprea, E.; Granitto, P.M.; Romano, A.; Gasperi, F.; Biasioli, F. (2013). Multiclass methods in the analysis of metabolomic datasets: the example of raspberry cultivar volatile compounds detected by GC–MS and PTR-MS. FOOD RESEARCH INTERNATIONAL, 54 (1): 1313-1320. doi: 10.1016/j.foodres.2013.02.004 handle: http://hdl.handle.net/10449/23194

Multiclass methods in the analysis of metabolomic datasets: the example of raspberry cultivar volatile compounds detected by GC–MS and PTR-MS

Cappellin, Luca;Aprea, Eugenio;Romano, Andrea;Gasperi, Flavia;Biasioli, Franco
2013-01-01

Abstract

Multiclass sample classification and marker selection are cutting-edge problems in metabolomics. In the present study we address the classification of 14 raspberry cultivars having different levels of gray mold (Botrytis cinerea) susceptibility. We characterized raspberry cultivars by two headspace analysis methods, namely solid-phase microextraction/gas chromatography–mass spectrometry (SPME/GC–MS) and proton transfer reaction-mass spectrometry (PTR-MS). Given the high number of classes, advanced data mining methods are necessary. Random Forest (RF), Penalized Discriminant Analysis (PDA), Discriminant Partial Least Squares (dPLS) and Support Vector Machine (SVM) have been employed for cultivar classification and Random Forest-Recursive Feature Elimination (RF-RFE) has been used to perform feature selection. In particular the most important GC–MS and PTR-MS variables related to gray mold susceptibility of the selected raspberry cultivars have been investigated. Moving from GC–MS profiling to the more rapid and less invasive PTR-MS fingerprinting leads to a cultivar characterization which is still related to the corresponding Botrytis susceptibility level and therefore marker identification is still possible
Proton transfer reaction-mass spectrometry
Raspberry (Rubus idaeus)
Cultivars
Chemometrics
Data mining
Marker identification
Botrytis cinerea
Settore CHIM/10 - CHIMICA DEGLI ALIMENTI
2013
Cappellin, L.; Aprea, E.; Granitto, P.M.; Romano, A.; Gasperi, F.; Biasioli, F. (2013). Multiclass methods in the analysis of metabolomic datasets: the example of raspberry cultivar volatile compounds detected by GC–MS and PTR-MS. FOOD RESEARCH INTERNATIONAL, 54 (1): 1313-1320. doi: 10.1016/j.foodres.2013.02.004 handle: http://hdl.handle.net/10449/23194
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/23194
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