用三种化学诱变剂,即甲基磺酸乙酯(EMS)、乙烯亚胺(EI)和 N-甲基-N-亚硝基尿(MNU),诱发水稻胚乳或胚性状的各种突变。MNU 处理干种子时诱发的突变很少,但处理受精卵细胞诱发的突变相当多。胚乳突变的频率低于叶绿素突变。在诱发的胚乳或胚性状突变中,心白突变的频率十分高。除粉质突变体 CM2055外,其余突变体都是由单隐性基因控制的。就半透明度及染色性来说,暗色突变体介于腊质与非腊质水稻之间。虽然株系内突变体的半透明度和染色性几乎相 Various chemical mutagens, namely, ethyl methanesulfonate (EMS), ethyleneimine (EI) and N-methyl-N-nitrosourea (MNU) were used to induce various endosperm or embryo traits in rice mutation. MNU induced few mutations in dry seeds, but treatment of fertilized egg cells caused quite a number of mutations. The frequency of endosperm mutation is lower than chlorophyll mutation. In induced endosperm or embryo trait mutations, the frequency of cardiac mutations is very high. Except the silty mutant CM2055, all other mutants were controlled by a single recessive gene. For translucency and staining, dark-colored mutants are between waxy and non-waxy rice. Although in-line mutants are nearly translucent and staining