GROWTH ADAPTABILITY AND GENETIC STABILITY ANALYSIS AND COMPREHENSIVE EVALUATION OF 8 PAULOWNIA CLONES GENETIC ANALYSES AND INDEX SELECTION OF THE QUANTITATIVE CHARACTERS OF PAULOWNIA CLONES Study on the Genotypic Stability and Grown Adaptability of Paulownia Clones Dynamic Analysis of the Annual Growth of Paulownia Clones in Seedling Stage PRINCIPAL COMPONENT ANALYSIS OF THE LEAF CHARACTERISTIC OF PAULOWNMIA CLONES IN THE SEEDLING STAGE