Australian native Glycine clandestina seed microbiota hosts a more diverse bacterial community than the domesticated soybean Glycine max

The seed microbiome of the native legume Glycine clandestina (crop wild relative; cwr) was more diverse than that of the domesticated Glycine max and was dominated by the bacterial class Gammaproteobacteria. Both the plant species (cwr vs domesticated) and individual seed accessions were identified as the main driver for this diversity and composition of the microbiota of all Glycine seed lots, with the effect of factor plant genotype exceeded that of geographical location. A core microbiome was identified between the two Glycine species. A high percentage of the Glycine microbiome was unculturable (G. clandestina (80.8%) and G. max (75.5%) with only bacteria of a high relative abundance being culturable under the conditions of this study.