摘要： 应用0。8%甲基磺酸乙脂（EMS）处理冀豆1号及冀豆6号大豆种子后获得突变体，对其M₂有关性状的相关分析结果表明，子粒蛋白质含量与脂肪含量呈显著负相关；蛋白质含量与株高、百粒重、生育日数、开花期呈显著正相关，而与粒茎比呈显著负相关。M₂与M₃间子粒蛋白质含量的相关值达显著水平。从M₂起累代选择子粒蛋白质含量高的变异株，所选出的突变系的子粒蛋白质含量比原品种提高2.0%~3.0%。

关键词: 大豆, 化学诱变, 甲基磺酸乙脂, 蛋白质含量, 育种

Abstract: The mutants were induced from seeds of soybean cultivars Jidou 1 and Jidou 6 with 0.8% ethyl methane sulphonate (EMS),and the related characters of their M₂ generations were analysed. The results showed that the protein content negatively correlated with the oil content, it positively correlated with the plant height, 1000-seeds-weight, days of growing stage, days of flowering season, but negatively correlated with the ratio of seed weight to stem weight. The relation values of grain protein content in M₂ and M₃ presented significant variation. The mutant strain in which the grain protein content was high were selected from M₂ to M4 generations. The grain protein content in the mutant lines selected was higher than that in the original varieties by 2.0%-3.0%.

Key words: Soybean, Chemical mutation, Ethyl methane sulphonate, Protein con-tent, Breeding