Marker Assisted Selection (MAS) method was used in this research to accelerate the selection process, since the disease resistance had low heritability value. Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) technique used to select the genotype of Mx++, Mx+- and Mx– that corresponded to the positive antiviral activity (Mx++), or those which had positive or negative activity (Mx+-) and negative antiviral activity (Mx–).