Abstract
The DNA base composition (expressed as mean molar percentages of guanine and cytosine) of 25 strains of Rhizobium japonicum was determined to study the genetic relatedness of these strains. The mole percentage GC ranged from 61.47 to 64.09. Statistical analysis of the DNA base ratios of the 25 isolates revealed that 16 of these differed significantly in GC ratios from some of the other strains.
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