China has also been successful in breeding soybean varieties using mutation techniques. For example, the mutant soybean varieties developed by the Genetics Institute of the Chinese Academy of Sciences possess different excellent traits such as high yield, good grain quality, disease/insect resistance, or drought/salt tolerance. The total area planted with these varieties was more than 1x107 ha. [9]. The “Henong series” soybean mutant cultivars, developed and released by the Soybean Institute of Heilongjiang Academy of Agricultural Sciences, as wellas another variety, Tiefeng18, were grown on an area of more than 2.33x106 ha and 4xl06 ha respectively (Ministry of Agriculture, China, unpublished data).