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不同比例的感病和耐病、感病和抗病水稻品种的混合群体,对稻瘟病(Pyriculariaoryzae Cav)的浸染速率进行了研究。当混合群体中有75％以上的耐病品种(CR44-119-1)或50％以上的抗病品种(Zenith)时,则感病品种(CO.13)的侵染速率显著降低。此外,甚至在感病品种占99％比例时,耐病或抗病品种上的侵染速率亦不受到影响。
The mixed populations of susceptible and disease-resistant, susceptible and resistant rice cultivars with different proportions were investigated for the rate of dissemination of the rice blast (Pyricularia oryzae Cav). When more than 75% disease-resistant variety (CR44-119-1) or more than 50% Zenith was present in the mixed population, the infection rate of the susceptible variety (CO.13) was significantly reduced. In addition, the rate of infection on resistant or resistant varieties is not affected even when susceptible varieties account for 99%.