新疆奶花芸豆立枯丝核菌菌丝融合群及其致病性研究  

Anastomosis Groups and their Pathogenicity of Rhizoctonia solani Kühn Isolated from Phaseolas vulgaris in Xinjiang

作　　者：杨金红[1] 白丽艳[1] 郭庆元[1] 刘华威[1] 赵震宇[1] 

机构地区：[1]新疆农业大学农学院,新疆乌鲁木齐830052

出　　处：《新疆农业科学》2006年第4期302-305,共4页Xinjiang Agricultural Sciences

基　　金：国家科技攻关项目"绿色奶花芸豆关键技术开发"

摘　　要：从新疆奶花芸豆主产区采集的奶花芸豆立枯病、根腐病、茎腐病病苗及土样中分离得到85个丝核菌(RhizoctoniaDC)菌株,经鉴定均为立枯丝核菌(Rhizoctonia solaniKühn)。对85个立枯丝核菌菌株进行的菌丝融合群判定和致病性测定结果表明,在新疆对奶花芸豆造成侵染为害的立枯丝核菌菌丝融合群有AG1、AG2、AG4、AG5,其出现频率分别为16.5%、34.1%、29.4%和20.0%;各融合群对奶花芸豆苗期致病性存在一定差异;在4个融合群中,以AG2分布最广,致病性最强。试验对奶花芸豆立枯丝核菌的菌丝融合群组成,及各融合群对奶花芸豆的致病性进行了研究。Eighty- five isolates of Rhizoctonia DC. were isolated from diseased tissues and soil in Phaseolas vulgaris fields in Xinjiang, China. All of these isolates were identified as Rhizoctonia solani Kuehn. According to the discriminate results of anastomosis groups（AGs）, these isolates of Rhizoctonia solani were categorized as follows： AG1, AG2, AG4, AG5- four anastomosis groups（AGs）. Their occurrence frequency in order was 16.5%, 34.1%, 29.4%, 20.0%. The testing results of pathogenicity showed that AG- 2 had the most widespread distribution, and strongest pathogenicity. This research first time reported the anastomosis groups constitutes of Rhiizoctonia solani Kühn in Phaseolas vulgaris, and the different pathogenicity of each anastomosis groups.

关 键 词：奶花芸豆 立枯丝核菌 融合群 致病性 

分 类 号：S643.9[农业科学—蔬菜学] S436.43[农业科学—园艺学]