茎瘤芥霜霉病抗性评价标准的建立与应用  

Establishment and applications of the evaluation standards of the resistance to the downy mildew of tumorous stem mustard

作　　者：王旭祎[1] 王彬[1] 范永红[1] 刘义华[1] 林合清[1] 周光凡[1] 

机构地区：[1]重庆市涪陵区农业科学研究所,408000

出　　处：《植物保护》2008年第6期61-64,共4页Plant Protection

基　　金：重庆"十一五"重大科技项目(10376)

摘　　要：为了给茎瘤芥霜霉病研究提供抗性评价依据,人工模拟研究了茎瘤芥叶面损伤对其主要经济性状的影响。结果表明:茎瘤芥从上至下的4片完全展开的叶在瘤茎鲜重的增加中起着决定性的作用,特别是这4片叶的总叶面积受损超过1/2后,其受损程度与植株收获物瘤茎的产量成比例变化,受损越重,瘤茎越轻,同时对余下的主要经济性状影响较小。以此为据,结合前人研究经验提出了茎瘤芥霜霉病的分级标准与抗性型划分标准。In order to provide the basis for resistance evaluation of the downy mildew of tumorous stem mustard, the effect of foliar loss of tumorous stem mustard on main economic characters was studied based on artificial simulation. The results showed that the four whole leaves of tumorous stem mustard from the top down play a decisive role in the weight increase of tumorous stern. The extent of damage was proportional to the yield of tumorous stem when the total damaged leaf area of the four whole leaves was more than 50%. The weight of tumorous stem was lighter when the damage became more serious, but it had little influence on the main economic characters of the rest. The grading and resistance standards of the downy mildew of tumorous stem mustard was provided on the basis of our studies in combination with previous experiences.

关 键 词：霜霉病 抗性 评价标准构建 茎瘤芥 

分 类 号：S436.344[农业科学—农业昆虫与害虫防治]