Phylogenetic ML tree based on 938-bp alignment of nucleotide sequences of the IGS between the 16S and 23S rRNA genes. Only bootstrap probability values of ≥70% (over 100 replicates) are indicated at the branching points. The scale bar indicates the number of substitutions per site. Soybean isolates are shown in bold, with their IGS haplotypes indicated. The letter “T” indicates the type strain of the species. Accession numbers of sequences extracted from GenBank are as follows: PAC53, AY628088; type XIX, AY493859; LMG R16434T, AJ534605; MSDJ G17, AF338851; PAC40, AY628087; LMG 6138T, AJ279264; BC-P22, AY386706; LMG 21987T, AJ631967; USDA 110, BA000040; LMG 18230T, AJ279301; USDA 135, AF208511; LMG 11944, AJ279287; LMG 10726, AJ279281; EC550-1, AY628085; PAC43, AY628089; PAC18, AY628093; LMG 10677, AJ534597; LMG 10671, AJ279272; LMG 10705, AJ534592; LMG 6134T, AJ279308; LMG 11951, AJ534594; and LMG 8293, AJ279311.