What type of database to use for q2-fragment-insertion

Hello Alan,

First of all, I would advise using Greengenes2 instead of Silva: this is a more comprehensive database of V4, tutorial here Introducing Greengenes2 2022.10.
If you still want to do SEPP, just go to: Data resources — QIIME 2 2023.5.1 documentation. The tree for SEPP wasn't updated since 2016 though.

Cheers,
V

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