EVALUATION OF MAIZE INBRED LINES FOR RESISTANCE TO SUGARCANE MOSAIC VIRUS (SCMV) AND MAIZE DWARF MOSAIC VIRUS (MDMV)

摘要

Field and greenhouse experiments were performed to evaluate 124 maize inbreds for their reaction to inoculation with sugarcane mosaic virus (SCMV) and maize dwarf mosaic virus (MDMV). Plants were mechanically inoculated twice with SCMV or MDMV and symptoms were evaluated at weekly intervals. The progress of symptom development showed good agreement between inbreds inoculated with SCMV and with MDMV under field and greenhouse conditions. Three inbreds showed complete resistance to SCMV and MDMV across all experiments, 19 inbreds expressed partial resistance, and the remaining inbreds were highly susceptible. In a greenhouse experiment conducted to evaluate 15 inbreds for their reaction to SCMV, MDMV, Johnson grass mosaic virus (JGMV), and sorghum mosaic virus (SrMV), 5 lines were completely resistant to all 4 viruses. Correlations between percentage of infected plants per inbred were high among SCMV, MDMV, SrMV and JGMV.