烟草不同品种对青枯菌的抗性分析  

ANALYSIS OF THE RESISTANCE OF DIFFERENT VARIETIES TO PSEUDOMONAS SOLANACEARUM (SMITH) SMITH

作　　者：郑继法[1] 张建华[1] 李连臣 王智发[1] 

机构地区：[1]山东农业大学烟草研究室,山东省济宁市

出　　处：《山东农业大学学报（自然科学版）》1995年第1期23-29,共7页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：本文研究了２４个烟草品种对青枯菌（Ｐｓｅｕｄｏｍｏｎａｓｓｏｌａｎａｃｅａｒｕｍ（Ｓｍｉｔｈ）Ｓｍｉｔｈ）的相对抗性水平。方差分析表明，只有少数品种间抗性水平有显著差异。根据不同接菌浓度下品种的抗性水平分析，相对抗性较强的品种有Ｎｃ９５、Ｎｃ８２和Ｏｘｆｏｄ２６等；较有感病的品种有青梗和Ｋｙ９两个品种，其余品种介于两者之间。烟草抗性水平与接菌浓度密切相关。同一品种在不同接菌浓度下的抗性水平有很大的差异，与其他品种相比，永定一号在低菌浓度接种后抗性最强，在高菌浓度接种后抗性最弱，Ｇ２８的抗性变化正好与永定一号相反，而Ｙｅｌｌｏｍａｍｍｏｔｈ在两种接种浓度下相对抗性水平保持一致。说明烟草不同品种对接菌浓度的变化敏感性不同。对抗感水平不同的烟草品种在由低到高接菌浓度下的发病动态学分析指出，较为感病的品种永定一号、Ｇ１４０和４－４在接菌后１４ｄ内病情指数急剧上升，且接菌浓度愈高，病情指数上升愈快，最终病情指数愈大。较为抗病的品种Ｎｃ９５、Ｎｃ８２和Ｇ２８，发病动态与接菌浓度相关性不密切。Twenty-four tobacco varieties were analyzed for the resistance to Pseudomonassolanacearum. Results of variance analysis showed that there were significant differences on ly among a few varieties in resistances to P. solanacearum. The comparison of tobacco resist ance between varieties inoculated with different inoculum density revealed that amongthose tested Ti448A, Nc95, Nc82 and Oxford 26 were more resistant and Qinggeng, Ky9more sensitive. Tobacco resistance was closely related with the inoulum density and therewere great differences among resistances of vatieties treated with various inoculum densitiesAs compared with others, Yongding 1 was more resistant while treated with low inoculumdensity and more sensitive while treated with higher inoculum density. G28 was just contra ry to Yongding 1. Analysis on the disease dinemics of tobacco varieties with different resist ance pointed out that the disease indices of varieties with lower resistance increased sharplyduring 14 days after the inoculation, the higher the inoculation density the faster the in crease of the disease indices, and the severer the final disease degree, but no close relation ship was found between the inoculum density and the disease dynemics of varieties withhigher resistance. It is suggested that there might be differences among tobacco varieties inthe mechanism of sensitivity to inoculum density.

关 键 词：烟草 品种 抗病性 青枯病菌 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]