Influence of nitrogen on relative parasitic fitness of cultivar-race combinations of rice blast

Rice blast, caused by Magnaporthe grisea, is one of the most important rice diseases in China. Resistance breakdown often happened, especially in the field supplied with high nitrogen fertilizer. In the simulation study on race dynamics and cultivar-race interaction on population level, the influence of nitrogen on the relative parasitic fittness of cultivar-race combinations should be realized quantitative-ly.