Correction to: Nature Biotechnology https://doi.org/10.1038/s41587-020-0501-8, published online 27 April 2020.

In the version of this article initially published online, the first author of ref. 29 was given as G. M. Barco and the title was given as “A genus definition for Bacteria and Archaea based on genome relatedness and taxonomic affiliation.” The correct author is R. A. Barco and the correct title is “A genus definition for Bacteria and Archaea based on a standard genome relatedness index.” The error has been corrected in the print, PDF and HTML versions of the article.