The identification of Bradyrhizobium japonicum strains isolated from Italian soils

Polymerase chain reaction analysis with arbitrary primers and pyrolysis mass spectrometry (PYMS) help isolate and characterize Bradyrhizobium japonicum strains from Northern Italian fields. The two techniques help distinguish whether the strains are inoculate derivatives and indicate the presence of a CB1809 strain as an inoculant. PYMS data also reveal that two specific derivative populations arise from the inoculant, one exhibiting a modified phenotype and the other resembling the parent strain.