In two-line hybrid rice, breeders have been focusing on improving quality of parental lines that have high cooking and eating quality. Fifteen lines were evaluated on grain quality. Five lines (ST19, A3, 135s, E15S-1, E15S-2 and E15S-3) showed low gelatinazation temperature (GT), 6 lines (Sen cu, HC1, HC2, A2, A12 and Hoa sua) have intermediate GT and 4 lines (R998, A11, HC3 and A3) have high GT. Eight lines were identified carryingaromatic fgr gene including three TGMS lines (E15S-1, E15S-2 and E15S-3), two restorer lines (HC1 and HC3) with avarage amylose content (21.5 - 24.7 percent)
and 3 lines (Sen cu, HC2 and Hoa sua) with low amylose content (15.5 - 18.4 percent).