这一问题在很大程度上取决于作物的类型和病原体的生物学性质。对于具有贮藏器官或类似结构的作物以及引起严重腐烂的病原体来说,如果希望获得有效的抗性,必须完全排斥病原体。而对谷类、豆类等作物以及导致衰弱的病原体来说,部分抗性也许比完全抗性更为合乎需要。前者使病原体生长迟缓,由此延迟流行病蔓延。而后者往往对病原体施加强大的选择压力,导致易感病变异体的抗性快速崩溃。遗憾的是,离体发现 This issue depends very much on the type of crop and on the biological properties of the pathogen. For crops with storage organs or similar structures and pathogens causing severe decay, pathogens must be completely rejected if effective resistance is desired. Partial resistance may be more desirable than complete resistance to crops such as grains and legumes, and to pathogenic pathogens. The former slows the growth of pathogens, thereby delaying the spread of the epidemic. While the latter often exert a strong selection pressure on the pathogen, resulting in a rapid breakdown of susceptibility to the susceptible variant. Unfortunately, found in vitro