Practical cross-resistance to maize-pathogen viruses
1992
Gaborjanyi, R. | Hoang, N.D.
Such sorghum varieties and inbred breeding lines infected with MDMV-A, SCMV-MB and SCMV-A were chosen for the experiment as gave different symptoms for at least two of these virus strains. Partial cross-resistance can be detected also between the maize-pathogen potyviruses. Susceptible host-virus relationship do not exclude double infection, which can be observed in maize under natural conditions. In the present experiments the cross-resistance between the maize-pathogen viruses was not complete, but only partial. In the majority of cases the resistance resulted in the prevention of complete destruction or in a reduction in the intensity of the symptoms. A reduction in resistance, or its complete absence on a given experimental variety, was caused by the increased pathogenity of the strain rather than by the closeness of the relationship between the viruses (or their strains)
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