华南农业大学学报2016，Vol.37Issue(3)：67-72,6.DOI:10.7671/j.issn.1001-411X.2016.03.010
甘蔗梢腐病田间抗性评价体系的建立
Establishment of an evaluation system for field resistance against sugarcane pokkah boeng
摘要
Abstract
Objective] To discuss the field grading standard on sugarcane pokkah boeng disease severity , and study regional and varietal ( clonal ) differences in occurrence of pokkah boeng disease .[Method]The occurrence of pokkah boeng disease on 11 new sugarcane varieties ( lines) and the dominant cultivar ROC22 in Guangxi was investigated in six sites including Nanning , Liuzhou, Hechi, Baise, Beihai and Chongzuo cities .The grading standard on sugarcane pokkah boeng disease and the resistance evaluation system were established .[Result]The incidence and disease severity index ( DSI) of new-planting sugar-cane were 0.16%-23.82% ( average 3.51%) and 0.03 -16.48 ( average 3.45 ) respectively , and those of ratoon cane were 0-25.89%( average 4.27%) and 0-17.37 ( average 4.61 ) .According to the new standard , six resistance grades were established , including high resistance ( HR ) , resistance ( R) , medium resistance ( MR ) , medium susceptible ( MS ) , susceptible ( S ) and high susceptible (HS).HR and HS sugarcane varieties (clones) were not found in the 12 tested materials.Among the 12 varieties, Guifu06-156, Guitang05-3846, GuixuanB9 and ROC22 belonged to R grade and demonstra-ted the highest resistance against pokkah boeng disease , and Guitang06-1023 and Guitang06-400 were S grade with the lowest resistance .The 12 tested sugarcane varieties ( clones ) were clustered according to the DSI, and the result agreed with that of resistance grading .The incidence of pokkah boeng disease showed regional difference in Guangxi .The sugarcane areas of Chongzuo , Liuzhou and Hechi were the most serious , followed by Beihai , and Baise and Nanning were the least serious .[Conclusion] There were distinct differences among different sugarcane areas , among varieties(lines)and among planting sea-sons regarding the susceptibility and resistance against pokkah boeng disease .关键词
甘蔗/梢腐病/分级标准/抗性评价/聚类分析Key words
sugarcane/pokkah boeng/grading standard/resistance evaluation/cluster analysis分类
农业科技引用本文复制引用
王泽平,段维兴,李毅杰,梁强,周主贵,张木清,林善海..甘蔗梢腐病田间抗性评价体系的建立[J].华南农业大学学报,2016,37(3):67-72,6.基金项目
现代农业产业体系建设专项（CARS－20－2－3）；公益性行业（农业）科研专项（200903004－41）；广西自然科学基金（2015GXNSFAA139051）；广西农科院基本业务专项 （）
