| [characterization of rhizobium isolates from acid and alkaline soils in semi-arid regions of pernambuco]. | the genetic variety of the rhizobium isolates from acid and alkaline soils in the semiarid zone of pernambuco state was evaluated through the use of 17 primers of arbitrary sequence. amplified products were separated by electrophoresis in agarose gel at 1.4% and visualized by ethidium bromide coloration. the results obtained suggest a high genetic variety of the isolates in relation to the standard strain. data were analyzed by upgma (unweighted pair-group method with arithmetic average), based ... | 2002 | 12600001 |