To validate the level and broad spectrum of resistance against
BPH populations collected in Thailand, the selected lines were
evaluated at the seedling stage using SSBS. Six BPH populations
were selected based on its variations from the previous study
(Jairin et al., 2007a). All selected lines carrying Bph3 showed
resistance to all BPH populations (Table 3). The result indicated
that a broad spectrum BPH resistance gene which has been
introgressed from RH to KD was effectively against the variation of
BPH populations found in Thailand.