With the development of market economy and improvement of people's living condition, fruit quality is gradually concerned by people. In order to detect the difference of fruit quality between different production areas and cultivars, Ponkan mandarin (Citrus reticulata Blanco), Okitsu wase ( Citrus reticulata Blanco), Newhall navel orange (Citrus sinensis L.) and 37 citrus cultivars were used as materials. In order to provide the theoretical way for citrus cultivars introduction and regionalization, study wa...