The production and productivity of major crop plants have reached their plateu during the past decade because of adop-tion of green revolution technologies. However, further increase in production of cereals with improved cereal quality is imperativeto fe

This study was carried out to develop a prom ising japonica rice variety resistant to brown planthopper(Bph) through marker-assisted selection(MAS) and backcross breeding methods. 'Milyang 64' which is known as resistant japonica variety to Bph used as a