XVI International Botanical Congess

Representative 24 flavonoids have been determined in the edible part of 66 Citrus species and near citrus relatives, grown in the same field and year by means of reversed phase HPLC analysis. The F-ratios of 22 flavonoids obtained by applying ANOVA analysis are significant, indicating that a classification of the species using these variables is reasonable to pursue. The principal component analysis revealed that the distribution of Citrus species belonging to different classes was largely in accordance with Tanaka's classification system, and that hesperidin and naringin were mutually exclusive at higher concentrations. The flavonoid profiles of 24 hybrids of C. nobilis and C. kinokuni will be also presented.