Adances on research of regeneration system of alfalfa

As one of the most widely distributed grass, alfalfa (Medicago sativa) was regarded as the king of forages. Based on the recent research trend of domestic and international, the paper presented the research progress on the regeneration of alfalfa, including regeneration pathways, genotypes, explants, basic media, growth regulators and other additives. The paper also analyzed the current problems and explored the future development trends in order to provide useful advices for the regeneration mechanism and gene engineering.