一种水稻分蘖突变体的初步分析（简报）

PRELIMINARY ANALYSIS OF A RICE TILLER MUTANT

摘要:

通过EMS(甲基磺酸乙酯, ethyl methane sulfonate)诱变处理籼稻丰矮占5号的种子,在M₂代中分离到一株少分蘖突变体,命名为ret5-5(reduced tiller mutant)。植株表现为不分蘖,自交所得M₃、M₄和M₅代植株表现为0-2个分蘖,而原正常品种FAZ-5同期平均分蘖数为8.2。突变体与FAZ-5的杂交结果显示该突变表型为隐性突变。在F₁代自交所得 F₂和F₃代植株出现性状分离,突变可能涉及2个或2个以上的基因。

Abstract:

The seeds of lndica rice (Oryza sativa) variety FAZ一5 were treated with ethyl methane sutfonate (EMS) for mutation breeding．A reduced till mutant (ret5-5)，which exhibited no tiller, was obtained from M₂ population The selfed progenies M₃, M₄ and M₅ showed 0-2 tillers．while its parents， FAZ一5，had average 8.2 or more tillers in the corresponding period The mutant ret5-5 after being crossed with FAZ-5 indicates that it is a recessive mutant and more than oue gene were mutated after the EMS treatment．