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用亚硝酸诱变获得的烟花叶病毒弱株系 N_(11),在实验温室中对番茄和烟感染强株系具有保护作用。在杭州市的田间实验中,接种 N_(11)弱株系的番茄比未接种的对照增产11.39%。在兰州市的田间和生产性温室实验中,分别增产10.9～12.7%和27.5～32.2%
The weak line of tobacco mosaic virus N_ (11) obtained by nitrous acid mutagenesis has a protective effect on tomato and tobacco-infected strong lines in the experimental greenhouse. In the field experiment in Hangzhou, the tomato inoculated with the weak line of N_ (11) increased yield by 11.39% compared with the uninoculated control. In Lanzhou’s field and productive greenhouse experiments, they increased yields by 10.9-12.7% and 27.5-32.2%