关键词: 根瘤菌, 诱变育种, 固氮能力, 抗逆性

Abstract: The establishment of rhizobia-legumes symbiotic nitrogen fixation system can not only promote soil nitrogen accumulation and improve soil fertility, but also have great potential for ecological restoration under different environmental factors. However, long-term studies have shown that these environmental factors also limit the system to play a full role in agricultural production. Through mutation breeding, the strain can be genetically mutated to obtain the high-yield and high-quality strains required. Based on this, the research and application of rhizobia mutagenesis breeding with high nitrogen fixation and stress resistance were reviewed in this paper, and the existing problems in the research and application of rhizobia mutagenesis breeding were put forward, expecting to provide reference for nitrogen fixation research.

Key words: Rhizobium, mutation breeding, nitrogen fixation capacity, stress resistance