STUDIES ON VARIETAL CHARACTERISTICS IN CULTIVARS OF ORYZA SATIVA VI.Application of Quantitative Characters of Genetic Diversity of High Quality Varieties to Selection Parents In Late Rice Quality Breeding Factors Influencing the Regeneration Frequency of Mature Embryo-derived Callus in Hsien Rice Cultivars (Oryza sativa L.) BREEDING AND APPLICATION OF HSIEN RICE RESTORING LINE CHEN R92-225 BY ALLOMIXIS-IRRADIATION A COMPARATIVE STUDY ON THE PHOTOSYNTHETIC CHARACTERISTICS OF EUCALYPTUS CITRODORA AND BURRETIODENDRON HSIENMU Growth models of Excentrodendron hsienmu population in a karst seasonal rain forest Studies on Biological Characteristics and High-Yielding with Dwarfing and Close Planting Systems in Camellia yuhsienensis Natural regeneration of young Excentrodendron hsienmu in karst mountainous region in Southwest Guangxi,China. Relationship between Plant Diversity and Environmental Factors of Excentrodendron hsienmu Community in Karst Mountains in Pinguo County,Guangxi Scanning Electron Microscope Observation on Endosperm Starch Grain Cnaracters in Orvza sativa subsp. Hsien Analysis on the change of the original Metasequoia glyptostroboides population and its environment in Lichuan Hubei from 1948 to 2003