Primary Selection of Excellent Catalpa fargesii Clones Based on Growth and Wood Properties

To select excellent clones characterized by fast growth and high-quality wood of Catalpa fargesii Bur., traits, including height diameter at breast (DBH) 1, 9, 11 13 years old, were collected properties, the Pilodyn value elastic modulus age 200 C. from different ecological areas (four provinces), measured. Genetic variation analysis repeatability estimation carried out. The correlation between characteristics geographical climatic factors analyzed. Excellent selected a comprehensive evaluation method combined with breeding values. traits significantly among clones. coefficient (CV) ranged 12.12% to 26.17%, (R) 0.79 0.97. ages correlated, values positively correlated altitude negatively longitude. Tree showed high negative properties. suitable tree for early selection properties is old. Nine growth, six three great selected, which laid foundation further optimization Additionally, in western high-altitude featured while those eastern low-altitude had better This study serves as reference areas.