A mutant of indica type rice 9311, mutagenized with 0.15% EMS (ethylmethane sulphonate) and named as stem gravitropism response mutant (sgrm), was obtained and studied in the following aspects.

• 用0.；15%25EMS(甲基磺酸乙酯)诱变处理籼稻品种9311获得突变体；命名为茎向重力性反应突变体(sgrm)。