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Phylostratigraphy analysis of Rhizophagus irregularis genes. a) Left panel: R. irregularis lineage. Right panel: number of genes at each phylorank before (full line) and after (dashed line) accounting for homology detection failure (HDF). The dashed line represents genes with high confidence phyloranks that could not be explained by HDF. b) Model of gene birth and gene loss in the R. irregularis lineage.
