12种桉树焦枯病病原菌对10种桉树无性系致病性初步分析  

Preliminary Analyses on Pathogenicity of Twelve Calonectria spp. on Ten Eucalyptus Clones in China

作　　者：李国清[1] 李洁琼[1] 刘菲菲[1] 李天会[1] 陈帅飞[1] 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《桉树科技》2014年第4期1-7,共7页Eucalypt Science & Technology

基　　金：广东省林业科技创新专项―桉树重大病虫害控制技术研究与示范‖(2010KJCX015-03);广东省自然科学基金―广东桉树焦枯病及无性系选择研究‖(10145624536-400000);国家国际科技合作专项项目―重要林业病害致病力及多样性研究‖(2012DFG31830)

摘　　要：为了明确在中国发现的桉树叶片焦枯病病原菌Calonectria spp.对桉树的致病力大小,并测定不同桉树无性系对Calonectria病原菌抗病性的强弱,本试验采用在中国发现的12种Calonectria属(Ca.cerciana、Ca.chinensis、Ca.hongkongensis、Ca.microconidialis、Ca.papillata、Ca.parakyotensis、Ca.pauciramosa、Ca.pentaseptata、Ca.pseudoreteaudii、Ca.seminaria、Ca.terrestris、Ca.tetraramosa)共29株致病菌对10个桉树无性系(DH32-22、DH32-29、EC152、EC153、EC155、G1、K31、OC14、U6、W5)进行了室内离体叶片致病性测定。结果显示:12种被测试Calonectria病原菌均能在不同程度上使10个桉树无性系离体叶片产生病斑;不同种Calnectria病原菌对同一桉树无性系的致病性差异显著,不同桉树无性系对同种Calonectria致病菌的抗病能力也存在显著差异。Calonectria leaf blight, caused by species of the genusCalonectria, is widely distributed in Eucalyptusplantations in tropical and subtropical regions of the world. The aims of this study were to clarify the pathogenicity of different species ofCalonectriaon a range ofEucalyptushybrid clones and understand the resistance of different clones againstCalonectriaspecies in China. Twenty-nine isolates representing 12 species ofCalonectria（Ca. cerciana,Ca. chinensis,Ca. hongkongensis,Ca. microconidialis,Ca. papillata, Ca.parakyotensis, Ca. pauciramosa,Ca. pentaseptata, Ca. pseudoreteaudii,Ca. seminaria,Ca. terrestris, Ca. tetraramosa） were tested on 10Eucalyptusclones （DH32-22, DH32-29, EC152, EC153, EC155, G1, K31, OC14, U6, W5）. Leaf inoculation showed that all 12 testedCalonectriaspecies produced lesions on all 10Eucalyptus clones, to varying degrees. The pathogenicity of differentCalonectriaspecies to the sameEucalyptusclone differed significantly, and the resistance of differentEucalyptusclones to the same species ofCalonectria also differed significantly.

关 键 词：桉树 焦枯病 丽赤壳属 致病性 抗病育种 

分 类 号：S763.15[农业科学—森林保护学]