TAXONOMY OF THE CITRUS GENUS .2. MULTIVARIATE-ANALYSIS BY MEASUREMENTOF PEROXIDASE AND ESSENTIAL OIL COMPONENTS IN CITRUS-FLAVEDO

Cluster analysis was done of the oxygenated compounds in cold-pressed oil (CPO) prepared from the flavedo of 45 Citrus cultivars. The compou nds were classified into six main clusters. Pummelos formed two cluste rs containing mostly medium or larger sizes. Most of the sour Citrus f ruits were placed in the pummelo clusters, but each of C. limon and C. sudachi formed a cluster that contained no other members. Isozymic an alysis for peroxidase showed a band pattern of not more than three ban ds (P-1, P-2, and P-3) for the 42 Citrus cultivars tested. P-1 was the key band of the pummelo species. The confusion between pummelos and o ther fruits such as sour Citrus fruits in cluster analysis based on CP O components only was resolved on the basis of the zymograms of peroxi dase followed by cluster analysis.