STUDIES ON SOMATIC EMBRYOGENESIS FROM CELL SUSPENSIONCULTURE OF LOBLOLLY PINE Research on Superior Tree Selection with the Method of Dominant Contrast and Estimation of the Corresponding Gain Study on Hybr idiza tion among Exotic Pines and The ir Early GrowthAssessmen t of F1 Genera tion Prediction of Breeding Values and Selection to the Gene Resources of Loblolly Pine STUDIES ON LATENT INFECTION OF PINE SHOOT BLIGHT DISEASE(SPHAEROPSIS SAPINEA) Role of Nitric Oxide and Nucleases in Different Pine Species Inoculated with a Nematode (Bursaphelenchus xylophilus) in Their Resistance to the Infection Evaluation for the Growth Regularity of Progenies from Yingde Loblolly Pine Seed Orchard in North Guangdong STUDIES ON EMBRYOGENIC CALLUS INDUCTION AND PLANT REGENERATION IN LOBLOLLY PINE SOMATIC EMBRYOGENESIS FROM PROTOPLASTS OF LOBLOLLY PINE Spatial Analysis of Loblolly Pine Trees as Gene Resources STUDY ON GROWTH CHARACTERISTICS OF PINUS TAEDA PLANTATION GROWN IN FUJIAN PROVINCE Growth Variation and Selection to the Progeny of Nucleus Breeding Population of Pinus taeda The Within-tree Variation of Wood Basic Density of Loblolly Pine Studies on the Tissue Cultue of Pinus taeda, P.elliottii and P.serotina Research on Open-pollination Progeny Test in Loblolly Pine(Pinus taeda) The Occurrence of Shoot Dieback of Exotic Pines in Relation to Stand Growth and Site Conditions Influence of Pest Damage on the Development of Cones and Seeds of Pinus taeda Estimation of Heritability and Combining Ability for Growth, Stem-Straightness and Wood Density of the F1 Generation of Pinus taeda×P. caribaea DIRECT ORGANOGENESIS AND PLANT REGENERATION FROM MATURE ZYGOTIC EMBRYOS OF LOBLOLLY PINE ISOLATION AND CULTURE OF PROTOPLAST FROM EMBRYONIC SUSPENSION CELL OF PINUS TAEDA LINN. Estimation on Genetic Gains of Combined Selection for Growth Traits of Half-Sib Progeny of Pinus taeda Application of ectomycorrhizal fungi in Pinus taeda plantation forest Variation in Wood Properties of Different Provenances of Exotic Loblolly Pine for Pulpwood