Application of 3 DNA Fingerprinting Techniques in Strain Identification The Determination of the Taxonomic Status of Two Soil Rhizobia from Southern Tibet Screening of Bacillus strains with high inhibition on rape Sclerotinia disease and its lipopeptide compounds detection Phenotypic and genetic diversity of rhizobia isolated from root modules of Hedysarum spp. grown in the northern and northwestern regions of China