Full
Outline
To establish a rapid model for varietal discrimination of Chinese red wines by leveraging the differences in antioxidant activity among different varieties.
The total phenolic content, total flavonoid content, cupric ion reducing antioxidant capacity, 1,1-diphenyl-2-picryl-hydrazyl radical scavenging capacity and 2,2’-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) ammonium salt radical cation scavenging capacity of different varieties of Chinese red wines (Pinot Noir, Merlot, Cabernet Gernischt and Cabernet Sauvignon) were determined and compared. Meanwhile, principal component analysis (PCA), orthogonal partial least squares-discriminant analysis (OPLS-DA) and support vector machine (SVM) algorithms were combined to establish a varietal identification model for Chinese red wines.
Comparative analysis revealed that the order of antioxidant activity of the 4 varieties was: Cabernet Sauvignon>Merlot>Cabernet Gernischt>Pinot Noir. On this basis, the constructed PCA (R2Xcum=0.819) and OPLS-DA (R2Xcum=0.952, R2Ycum=0.424, Q2cum=0.387) models effectively characterized the data features and intergroup differences. The SVM varietal identification model achieved a cross-validation accuracy of 94.40%, with 100.00% accuracy in the training set and 96.26% accuracy in the test set.
Based on the variety-specific antioxidant activity differences of Chinese red wines, combined with multivariate statistical methods and machine learning algorithms, rapid and accurate discrimination of Chinese red wine varieties can be effectively achieved.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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