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Maize Dwarf Mosaic Virus Replication in Pigment-Deficient Mutants of Corn. D. E. Mayhew, Research Assistant, Department of Botany and Plant Pathology, Iowa State University, Ames 50010; R. E. Ford(2), and D. S. Robertson(3). (2)Professor and Head, Department of Plant Pathology, University of Illinois, Urbana 61801; (3)Professor, Department of Genetics, Iowa State University, Ames 50010. Phytopathology 63:1311-1312. Accepted for publication 16 April 1973. DOI: 10.1094/Phyto-63-1311.

Maize dwarf mosaic virus (MDMV) replication was demonstrated in several pigment-deficient mutants of corn. Infected plants were symptomless, and presence of the virus was determined by recovery assays on susceptible sweet corn. Of nine mutants tested, six supported replication of the A strain of MDMV, and eight supported replication of the B strain. Etiolated mutants seemed more susceptible to MDMV than those grown in light.