黑胫病菌在烟草品种间的侵染差异及I-S关系研究  

Study on the Infection difference of tobacco variety to Phytophthora nicotianae and the relationship between incidence and severity

作　　者：高正良[1] 周本国[1] 雷艳丽[1] 

机构地区：[1]安徽农科院烟草研究所,风阳233100

出　　处：《中国烟草学报》2004年第4期31-35,共5页Acta Tabacaria Sinica

摘　　要：1997～1999年在田间通过人工接菌方法比较了12个烟草品种间黑胫病菌侵染差异。结果表明,属高度感病的品种有K394、云烟85、红大;属中等程度偏感病的品种有贵烟11、Nc89;属中等程度感病如VA116、Nc37NF、K358、.Rg11;属中等抗病有K346、Nc82;高抗病类型有coker371。对烟草黑胫病根茎部发病情况进行系统调查,获得12个品种的普遍率与严重度间对应关系数据,并且分析了两者的关系(I-S关系)。结果表明,寄主生育阶段影响烟草黑胫病的I-S关系。各品种前期病株率不能真实反映各品种感病程度的差异,以中后期的病情指数为标准比较品种间抗感染程度较为适宜。不同品种的I-S关系均可用直线方程描述。By means of artificial inoculation, the infection difference of 12 tobacco varieties to black shank ( Phytophthora nicotianae Breda de Haan) were compared in field from 1997 to 1999. The information of infection and disease index of black shank were obtained and analyzed. The disease infection of varieties at their early stage could not reflect the difference of infection among them, and it was available to use disease index to compare the infection difference at their later stage. It was considered that the growth stage of host affected I-S relationship. I-S relationship of varieties could be expressed by liner regression equations.

关 键 词：烟草黑胫病 普遍率与严重度关系(I—S关系) 品种 感病差异 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]