Abstract
Seven strains of B. natto investigated were found to be all vulnerable to phage S-l, while five among them were able to transfer their genetic traits to B. subtilis by the phage. All strains, including the two which could not transduce, were able to transform the genetic markers in B. subtilis by the DNA. The transduction as well as the transformation from B. subtilis to B. natto was also successful. Based on these results, the geneticsimilarly between B. subtilis and B. natto was discussed.
