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Objective To explore the change of quality characteristics of Yunnan plateau specialty fresh Capsicum annuum L. and establish its evaluation system. Methods The 35 quality indexes of 59 samples of Yunnan plateau fresh Capsicum annuum L. were selected to determine and analyze, and the differences among the quality indexes of different samples of Capsicum annuum L. were investigated. The quality of Yunnan plateau specialty fresh Capsicum annuum L. was comprehensively evaluated by principal component analysis (PCA) and cluster analysis (CA), and the evaluation model of Yunnan plateau specialty fresh Capsicum annuum L. quality was established. Results There were significant differences in quality indexes among samples of Capsicum annuum L. (P<0.05), and the coefficient of variation of the quality indexes were different, indicating that the plateau fresh Capsicum annuum L. presented varieties between different quality attributes. PCA showed that 5 principal components represented the 35 quality indicators Capsicum annuum L., making 89.005% cumulative contribution to the total variance. Based on the CA results, indicators such as spiciness, capsaicinoids, dietary fiber, protein, soluble solids, carotenoids, amino acids and organic acids could be used to comprehensively evaluate the quality of Yunnan plateau specialty fresh Capsicum annuum L.. Conclusion Among 59 different samples of Capsicum annuum L., ‘Ca38’ has the best quality. ‘Ca55’ has the worst quality. The comprehensive evaluation method of PCA and CA can provide reference for the quality evaluation of different Capsicum annuum L. varieties, and provide the oretical basis for the breeding of special plateau Capsicum annuum L., and the development and utilization of the germplasm resources of Yunnan plateau specialty Capsicum annuum L..
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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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