A Study on the Early Selection of Superior Paulownia Clones / 泡桐优良无性系早期选择的研究

• Published in: Forest research (Beijing) Vol. 6; no. 2; p. 136
• Main Authors: 魏安智, 杨途熙
• Format: Journal Article
• Language: Chinese
• Published: Beijing Chinese Academy of Forestry 01.01.1993
• Subjects: Cloning
• ISSN: 1001-1498

Based on the measurements of eight-year-old test plantation of paulownia, the juvenile-mature correlations of height,diameter and volume were analysed by means of rank correlation, genetic correlation and phen-otype correlation. The linear regression equation of the juvenile-mature correlation was set up and the annual efficiency at different selection age was calculated. The results show that the early selection of superior paulownia clones is feasible and the expression of paulownia clones at the age of three could be used to predict the growth of clones at the age of ten to fifteen. Therefore, it is possible to select good clones when they are three years old. 根据8年生泡桐胸径、树高和材积等性状的早晚期相关系数建立的回归方程算出的年选择效率表明:以3年生胸径估计12年时胸径和材积;以3年生胸径和树高估计15年时材积,均具有极显著的相关性(r=0.5857～0.6360)和最高的选择效率(1.90～2.54),说明当泡桐无性系树龄达3年时即可根据胸径和树高进行早期选择;材积早晚期相关不显著,不宜作为早期选择的性状。