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从1963年开始,对六棱冬大麦栽培品种“竹林茨城1号”进行若干诱变处理,以寻求诱发有益突变的有效方法。应用的诱变剂有γ射线、热中子和化学诱变剂乙烯亚胺(EL)、甲基磺酸乙酯(EMS)和N-亚硝基甲基脲(NMU)。试验过程中,选出早熟突变体共61个。本文提出了各种诱变剂的早熟突变频率和选出的突变体的生理特性和遗传特性。对各种诱变剂诱发早熟突变的效率进行了比较。 61个突变体中,31个得自Y射线辐照种子或植株,5个得自中子辐照种子,25个得自化学诱变剂处理种子。汇集历年试验数据,每M_1穗系的早熟突变频率估计如下:γ射线每一万伦为0.26％,乙烯亚胺每
Beginning in 1963, a number of mutagenesis treatments were carried out on the hexapoda barley cultivar “Takayama Ibaraki 1” in order to find an effective method for inducing beneficial mutations. The mutagens used are gamma rays, thermal neutrons and chemical mutagens ethyleneimine (EL), ethylmethanesulfonate (EMS) and N-nitrosomethylurea (NMU). During the experiment, 61 precocious mutants were selected. This paper presents the frequency of early mutagenesis of various mutagens and the physiological and genetic characteristics of selected mutants. The efficiency of mutagenesis-induced mutagenesis was compared. Of the 61 mutants, 31 were from Y-ray irradiated seeds or plants, 5 from neutron irradiated seeds and 25 from chemical mutagenized seeds. The experimental data collected over the years, premature M_ panicle mutation frequency is estimated as follows: gamma rays per million Lun 0.26%, ethyleneimine per