Growth of Paulownia Witches’Broom Seedlings Treated with Methylmethane Sulphonate and SSR Analysis Effect of Oxytetracycline on the Morphology of Seedling with Witches‘ Broom and DNA Methylation Level of Paulownia tomentosa×P. fortunei Genetic Relationships among Paulownia elongata, Paulownia fortunei and Paulownia tomentosa Based on cpDNA rps16 Region Sequences The Laws of Branching and Trunk Extension Sprouted from Lateral Buds in Paulownia trees Study on the Temperature Characteristics of Dormancy Development of Terminal and Lateral Buds in Paulownia Effect of Methyl Methanesulphonate on DNA Methylation of Witches’Broom Seedlings of Paulownia tomentosa Analysis of Diploid and Its Autotetraploid Paulownia tomentosa×P. fortunei with AFLP and MSAP Study on the Early Prediction of Breeding Value for Paulownia tomentosa Morphological changes of the witches’ broom seedlings of Paulownia tomentosa treated with methyl methanesulphonate and SSR analysis Research on the Differentiantion Law of the Paulownia Timber Color