Principal coordinate analysis (PCoA) based on unweighted UniFrac analysis of all 16S rRNA gene sequences of epiphytic and endophytic Firmicutes found on hypogeous organs (roots), epigeous organs (leaves and spikes), and processed wheat (grain, chaff, bran, and flour) of Odisseo and Saragolla. Hypogeous and epigeous organs were analyzed at the tillering, stem elongation, booting, flowering, milk development, and physiological maturity stages.