Shang Xiuhua, Zhang Peijian, Li Xiaoming, Wang Youshuang, Wu Zhihua
Research Institute of Fast-growing Trees, Chinese Academy of Forestry, Zhanjiang, China.
State Key Laboratory of Efficient Production of Forest Resources, Beijing, China.
Front Plant Sci. 2024 Aug 19;15:1433670. doi: 10.3389/fpls.2024.1433670. eCollection 2024.
China is one of the countries in the world most seriously affected by typhoons, which pose a great threat to the eucalyptus plantation industry. However, few studies have comprehensively accounted for the impact of key traits on the wind damage/resistance of eucalyptus.
To identify the key factors affecting the wind resistance of eucalyptus, 20 eucalyptus genotypes were selected; a total of 18 traits, including the wind damage index, growth traits, and wood traits, were measured, and the wind resistance was determined via the tree-pulling test.
Correlation, principal component, canonical correlation, and path analyses were performed to evaluate these traits. Correlation analysis revealed that the wind resistance of eucalyptus plants was related to the tree height, volume, and duration of stress wave propagation. Principal components and tree-pulling variables were further used for correlation and path analyses. Canonical correlation analysis and the PA-OV model showed that holocellulose and lignin contents and fiber width, as well as growth traits, were important factors affecting the stability of standing trees under typhoon conditions. The key traits influencing the wind resistance of s , which may provide a reference for evaluating the wind resistance of varieties for forest management, were identified.
This study provides a knowledge base for forest management and planning in typhoon-prone coastal areas, and provides a theoretical basis for the breeding and genetically improving eucalyptus stocks based on wind resistance characteristics.
中国是世界上受台风影响最严重的国家之一，台风对桉树人工林产业构成巨大威胁。然而，很少有研究全面考虑关键性状对桉树风害/抗性的影响。
为确定影响桉树抗风性的关键因素，选择了20个桉树基因型；测量了包括风害指数、生长性状和木材性状在内的总共18个性状，并通过拉树试验确定抗风性。
进行了相关性、主成分、典型相关性和通径分析以评估这些性状。相关性分析表明，桉树植株的抗风性与树高、材积和应力波传播持续时间有关。主成分和拉树变量进一步用于相关性和通径分析。典型相关性分析和PA - OV模型表明，全纤维素和木质素含量、纤维宽度以及生长性状是影响台风条件下立木稳定性的重要因素。确定了影响桉树抗风性的关键性状，可为森林经营中桉树品种抗风性评估提供参考。
本研究为台风多发沿海地区的森林经营和规划提供了知识库，并为基于抗风特性的桉树育种和遗传改良提供了理论依据。
