Comparison of taxonomic ranks between GTDB and NCBI
The following graph represents difference between the bacterial NCBI and GTDB taxonomies.
The GTDB and NCBI taxonomies were compared across the 84,634 bacterial genomes obtained from NCBI that comprise part of the 94,759 genomes within the GTDB.
For each rank, a taxon was classified as being unchanged if the two taxonomies agreed,
passively changed if the GTDB taxonomy provided rank name information absent in the NCBI taxonomy, or actively changed if the two taxonomies disagreed
Relative evolutionary divergence
The following graphs show the relative evolutionary divergence (RED) of taxa at each taxonomic rank (0=phylum, 1=class, ..., 5=species).
RED values provide an operational approximation of relative time with extant taxa existing in the present (RED=1), the last common ancestor occurring at a fixed time in the past (RED=0),
and internal nodes being linearly interpolated between these values according to lineage-specific rates of evolution. The grey bars indicate the 10th, 50th, and 90th percentile of the RED distribution at each rank.
RED intervals for normalizing taxonomic ranks were operationally defined as the median RED value at each rank ±0.1 (indicated by the yellow bars; red bars indicate ±0.2).