Population Structure and Distribution Pattern of Cold Temperate Coniferous Forest in the Pangquangou National Nature Reserve Studies on the Factors Affecting of Somatic Embryogenesis in Embryonic Cell Suspension Culture of Picea wilsonii Application of Self-Organizing Feature Map to Classification and Ordination of Picea wilsonii Forest in Luya Mountain Nature Reserve Isolation and Expression Analysis of PwWDS1 in Picea wilsonii Effects of Arceuthobium sichuanense infection on photosynthesis and transpiration of Picea wilsonii Observation on Differentiation Potential and Chromosome Stability of Callus in Subcultures of Picea wilsonii Somatic Embryogenesis and Plantlet Formation of Picea wilsonii Mast. in Ditterent Conditions Classification and Ordination of Picea wilsonii Forests in the Luya Mountain Nature Reserve The Cloning and Expression Analysis of PwARP-1 in Picea wilsonii Expression Characteristics of PwEXP 1 Gene in Seed Germination and Adversity in Picea wilsonii Cloning and Tissue Expression Analysis of PwPSAF in Picea wilsonii Study on intraspecific and interspecific competition of Picea wilsonii in Liancheng National Nature Reserve