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一、历史 1963年,Van der plank总结了马铃薯品种对晚疫病抗性“丧失”的历史经验,提出了水平抗性和垂直抗性这一对概念,他注意到,含有来自野生种Solanum demissum的主效抗病基因的抗病品种(即R基因品种),虽然在新育成推广时表现免疫或高抗。然而大面积推广后不多几年就“丧失”了抗性,变为高度感病,反而不如过去的中度抗病的老品种。
I. History In 1963, Van der plank summarized the history of potato cultivars’ loss of resistance to late blight and put forward the concept of horizontal resistance and vertical resistance. He noticed that plants containing the species from the wild species Solanum demissum Disease-resistant cultivars (ie, R gene cultivars) with major disease-resistance genes, while immunized or highly resistant at the time of commercialization. However, within a few years after its widespread promotion, it has “lost” resistance and become highly susceptible, but not as good as the old moderately disease-resistant breeds of the past.