Plant pathogens have evolved numerous strategies to obtain nutritive materials from their
host, and plants in turn have evolved the preformed physical and chemical barriers as well
as sophisticated two-tiered immune system to combat pathogen attacks. Genetically, plant
resistance to pathogens can be divided into qualitative and quantitative disease resistance,
conditioned by major gene (s) and multiple genes with minor effects, respectively.
Qualitative disease resistance has been mostly detected in plant defense against biotrophic …