番茄苗龄对晚疫病生理小种T_1的抗性表现差异研究  

Age-related Resistance to Main Strains T_1 of Late Blight (Phytophthora infestans) in China during Tomato Seedlings

作　　者：李君明[1] 宋燕[1] 杨宇宏[1] 杜永臣[1] 冯兰香[1] 谢丙炎[1] 徐和金[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《植物遗传资源学报》2007年第2期231-233,共3页Journal of Plant Genetic Resources

基　　金：农业部蔬菜遗传与生理重点实验室项目;国家"863"计划项目(2002AA244011)

摘　　要：对感病和抗病品系3、6、9叶苗龄番茄幼苗人工接种晚疫病菌T1小种,结果表明,感病品系随着苗龄的增加,对晚疫病的感病程度有所减轻,其中6叶期较3叶期、9叶期较6叶期幼苗的病级指数分别降低了28.8%和3.9%,但差异不显著;9叶期较3叶期降低了31.0%,差异达显著水平。抗病品系的6叶期和9叶期较3叶期幼苗病级指数均降低了50%左右,差异达极显著水平;6叶期和9叶期幼苗抗性基本相同。Susceptible and resistant tomato lines were artificially inoculated with Phytophthora infestans strain T1 during different seedling ages of 3, 6, 9 leaves. Results indicated that with the seedling aging the susceptible lines presented lower susceptible level. The disease index decreased 28.8% and 3.9% respectively for 6 leaves stage compared to 3 leaves stage and 9 leaves stage compared to 6 leaves stage, while the difference between them was not significant. The disease index of 9 leaves seedlings decreased 31.0% than 3 leaves ones and the difference was significant at 5% level. Regarding to the resistant lines, the disease index of 6 and 9 leaves reduced also about 50% when compared to 3 leaves seedling. The difference was significant at 1% level. The resistance of 6 and 9 leaves age seedling was almost the same.

关 键 词：番茄 晚疫病 苗龄抗性 

分 类 号：S436.412[农业科学—农业昆虫与害虫防治]