我国番茄晚疫病菌中有甲霜灵抗性菌株，抗性频率为8.7%。
Isolates of Phytophthora infestans from tomato which are resistant to metalaxyl have been found in China, the frequency is 8.7%.
为了使马铃薯抗晚疫病基因RB能够在番茄育种和生产中应用，构建了RB无选择标记载体。
We construct a marker-free vector of RB gene in order to apply with RB in the tomato late blight breeding and production.
为了使马铃薯抗晚疫病基因RB能够在番茄育种和生产中应用，构建了RB无选择标记载体。
We construct a marker-free vector of RB gene in order to apply with RB in the tomato late blight breeding and production.
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