Venn diagram and abundance profile heatmaps of core bacterial and fungal OTUs. a, b Core OTUs of a bacterial and b fungal communities of 43 genotypes. Core OTUs were calculated respectively for the domesticated rice group and the wild rice group. The prevalence threshold for core OTUs was 95% (bacteria) and 80% (fungi) out of rice accessions. Heatmaps indicate the relative abundance of OTUs in rice accessions. RA, relative abundance.