Fig. S1 Detailed comparison of plant genetic distance between maize inbred lines (X axis) and similarity distance between total rhizobacterial communities associated to different maize inbred lines (Y axis).

Fig. S2 Principal component analysis of the five maize groups based on allelic data at 67 loci for each of two inbred lines per group. For each group, mean and standard deviation computed are represented (n = 2).

Fig. S3 Principal component analysis of 16S microarray results for bulk soil and rhizosphere samples from the five genetic groups of maize.

Fig. S4 Phylogenetic relationship between partial 16S rRNA sequences (214 bp) from (i) rhizosphere clones from maize lines FV252 and Mo17 (Corn Belt Dent group), W85 and FV4 (Northern Flint), (ii) type strains of representative species from the B.  cepacia complex, and (iii) type strains of representative species from other Burkholderia species.

Table S1 Effect of maize genetic group on seed weight or fresh biomass at 21 days.

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