Obtaining of Ponkan (Citrus reticulata Blanco ) Tetraploid by Culturing Embryos of Mature Seeds CYTOLOGICAL IDENTIFICATIONS ON Cloning, analysis, and expression of limonoid UDP-glucosyl transferase gene in Citri Reticulatae Semen Obtaining of Ponkan (Citrus reticulata Blanco ) Tetraploid by Culturing Embryos of Mature Seeds Study on the Anticancer Activities (In Vivo) of the Extract from Citrus reticulata Blanco and Its Influence on Sarcoma-180 Cells Cycle Identification of the pathogenic fungus causing brown spot on tangerine (Citrus re-ticulata CV. Hongjv) ‘Huawan Wuzi Shatangju’,A Late-maturing Mandarin Cultivar Study on changes in concentrations of four endogenous hormones in different fruit positions during citrus fruit growth and development Status quo of Ponkan ( Citrus reticulata Blanco) Fruit Quality and QualityComparison between Several Production Areas in China