RAPD electrophoretic patterns obtained with primer OPC 02. In the upper lanes, from left to right: 1 kb ladder (Gibco BRL), Azospirillum lipoferum BR17, CANRA, Azospirillum brasilense Sp7, MAX1, MAX2, MANR, MAP1A, TOM, MANC, MAGDE3, Beijerinckia sp. strain, 1 kb ladder. In the lower lanes, from left to right: Rhizobium meliloti strain, Herbaspirillum rubrisubalbicans M4, Herbaspirillum seropedicae Z67, COL, MI753, MIS, Burkholderia brasilensis M130, CAN9B, CANRB, CANF3, blank sample, 1kb ladder. All samples are in duplicate.