There is resistance to MDMV. Maize plants can have up to 5 resistance genes in their genetic make up. There are commercially available hybrids that provide good resistance. The major gene for resistance is called "mdm1" and it is found on chromosome 6. "Mdm1" was identified in Pa405, an inbred line. This chromosomal region of "mdm1" is also where resistance genes to two other phtyviridae viruses are located. The resistance conferred by "mdm1" can be greatly altered with genetic, environmental, and developmental factors.