为了取得杂交成功,育种家对增加各种类型的原始材料颇感兴趣。近年来,造成遗传变异的化学诱变方法引起科学家们的极大注意。这方面,苏联积累了丰富的材料,这些材料对遗传和育种研究具有特殊意义。例如拉波波尔特获得了一组高活性的化学诱变剂:乙烯亚胺,N-亚硝基乙基脲 In order to succeed in hybridization, breeders are quite interested in adding various types of raw materials. In recent years, chemical mutagenesis methods that cause genetic variation have attracted the great attention of scientists. In this regard, the Soviet Union has accumulated a wealth of materials that have special significance for genetic and breeding research. For example, Lappeer Porter has obtained a group of highly active chemical mutagens: ethyleneimine, N-nitrosoethylurea