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10～11年生杨树品系抗杨干象水平及其与树干物理特性的关系
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10～11年生杨树品系抗杨干象水平及其与树干物理特性的关系
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Journal Article
10～11年生杨树品系抗杨干象水平及其与树干物理特性的关系
2016
Overview
[目的]开展不同品系的杨树亲本来源、干部物理特性与抗性关系研究,为抗杨干象新品系的选育奠定一定基础。[方法]本研究连续2年研究了10个亲本51个不同杨树品系10 11年生杨树的被害株率、杨干象虫口密度与杨树木质部硬度、树皮硬度、树皮厚度、胸径等的关系。[结果]免疫品系、高抗虫品系、抗虫品系、感虫品系和高感虫品系木质部平均硬度分别为（47.38±1.71）HD、（46.07±1.17）HD、（44.64±1.61）HD、（41.84±1.66）HD、（40.73±2.04）HD;树皮平均硬度分别为（40±3.53）HD、（39.99±0.96）HD、（37.63±0.46）HD、（32.35±1.54）HD、（31.7±0.52）HD;平均胸径分别为（361.64±13.8）mm、（313.8±6.19）mm、（309.98±5.27）mm、（289.56±10.73）mm、（287.67±17.49）mm,亲本为美洲黑杨×青杨、马氏杨、美洲黑杨×马氏杨、小叶杨×胡杨的品系为抗虫品系;亲本欧洲黑杨×美洲黑杨、欧洲黑杨×小叶杨、美洲黑杨的多数品系为感虫品系。[结论]杨树木质部硬度与树皮硬度越大抗杨干象能力越强;胸径生长相对较快的品系抗性强;青杨、马氏杨、小叶杨为亲本抗虫性强,美洲黑杨、欧洲黑杨为亲本抗虫性差。在抗杨干象品系育种工作中应选择青杨、小青杨或甜杨做为亲本;避免以美洲黑杨或欧洲黑杨为亲本。
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