Qiime2 Taxonomic Database

Could anyone tell me what the most current taxonomic databases are used in Qiime2? Would be Silva realease 138?


Welcome to the forum @Jessica_Bianca_da_Si !

QIIME 2 is not tied to any specific database. Any database can be used with QIIME 2, provided that it is in the correct format.

However, several commonly used databases are pre-formatted and made available on the QIIME 2 data resources site for the convenience of the community.

If you are looking for formatted SILVA 138 formatted files, you can find them, and some description of the formatting, here: Data resources — QIIME 2 2021.2.0 documentation


@Nicholas_Bokulich, thanks for answer!

By the way, I trying to use Silva 138, but I had a error with the claasifier:

Plugin error from feature-classifier:

The scikit-learn version (0.21.2) used to generate this artifact does not match the current version of scikit-learn installed (0.23.1). Please retrain your classifier for your current deployment to prevent data-corruption errors.

How can I solve this?


You can search the forum archives to see lots of info relating to this error, e.g., see discussion here:

Good luck!