| 摘要: |
| 为明确甘蔗叶冠形态与抗梢腐病相关性，在南宁市设置大田试验，以广西蔗区甘蔗梢腐病主要致病菌Fusarium verticillioides为毒源，对美国佛罗里达引进的13个甘蔗新品（系）和广西主栽品种ROC22进行接种研究。主成分分析法和相关性分析结果显示，甘蔗抗梢腐病性与其+1叶叶面积极显著正相关，与角度指数显著正相关。根据梢腐病病情指数抗性评价和聚类分析，14个参试甘蔗品种（系）被分成4类，即高抗品种CP07-2518、CP06-4647、CP06-3458和CP06-3332；抗病品种CP07-2547、CP07-1527、ROC22、CP06-3477和CP06-2897；中抗品种CP09-4707、CP09-4369和CP07-1533；中感品种CP06-3051和CP06-2422。结果表明，甘蔗叶冠形态与其抗梢腐病性存在一定相关性。株型紧凑、叶片狭窄直立且易脱叶的甘蔗品种对梢腐病抗性较强。反之，叶片宽大、披散下垂型且不容易脱叶的甘蔗品种对梢腐病抗性较差。 |
| 关键词: 甘蔗 梢腐病 叶冠形态 Fusarium verticillioides |
| DOI：10.11841/j.issn.1007-4333.2017.07.005 |
| 投稿时间：2016-07-05 |
| 基金项目:广西自然科学基金项目（2016GXNSFBA380046）；广西自然科学基金重点项目（2014GXNSFDA118015）；广西重点研发计划项目（桂科AB16380126） |
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| Effects of sugarcane canopy structure on pokkah boeng disease resistance |
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WANG Zeping1, LIN Shanhai1, LIANG Qiang1, LI Yijie1, LI Changning1, DUAN Weixing1, HE Tieguang2
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| (1.Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/Sugarcane Research Center, Chinese Academy of Agricultural Sciences/Guangxi Key Laboratory of Sugarcane Biotechnology and Genetic Improvement, Ministry of Agriculture, Nanning 530007, China;2.Agricultural Resources and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China) |
| Abstract: |
| To explore the effects of sugarcane canopy structures on resistance to pokkah boeng disease.Field experiment was carried out using Fusarium verticillioides as virulent source.Thirteen newly introduced clones from Florida,USA and dominant cultivar ROC22 in Guangxi were taking as planting materials.Principal component analysis and correlation analysis indicated that the pokkah boeng disease resistance was significantly and positively correlated with leaf area of first-top-leaf,and positively correlated with angle index.Furthermore,the 14 tested sugarcane materials were clustered to 4 grades:High resistant varieties (clones) were CP07-2518,CP06-4647,CP06-3458 and CP06-3332;CP07-2547,CP07-1527,ROC22,CP06-3477 and CP06-2897 belonged to resistance grade;CP09-4707,CP09-4369 and CP07-1533 belonged to medium resistance (MR) grade;CP06-3051 and CP06-2422 belonged to medium susceptible (MS) grade.There was correlation between sugarcane canopy structures and pokkah boeng disease resistance.The sugarcane variety (clone) with compact shape,stand upright and narrow leaves,and easy to defoliate displayed stronger resistance to pokkah boeng disease.The sugarcane variety (clone) with loose shape,wide leaves,and uneasy to defoliate showed the weaker resistance to pokkah boeng disease. |
| Key words: sugarcane pokkah boeng disease canopy structures Fusarium verticillioides |
