FIG. 4.
Phylogenetic ML tree based on 612-bp alignment of nucleotide sequences of the nifH gene. 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 nifH haplotypes indicated. The letter “T” indicates the type strain of the species. Accession numbers of sequences extracted from GenBank are as follows: CCBAU 83698, EU146010; CCBAU 23230, AY934871; CCBAU 61071, EU113228; USDA 110, BA000040; S 127, DQ485701; IFO 14791T, AB094963; CPAC 402, DQ485714; MAFF303099, BA000012; 3841, AM236084; and 1021, AE007235.