Hello colinbrislawn,
I used tutorial by SoilRotifer to processing, filtering and evaluation the SILVA database with Rescript from this forum: https://forum.qiime2.org/t/processing-filtering-and-evaluating-the-silva-database-and-other-reference-sequence-data-with-rescript/15494
I got SILVA data by Hard Mode from this tutorial.
Citations:
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Forster, D., Filker, S., Kochems, R., Breiner, H. W., Cordier, T., Pawlowski, J., & Stoeck, T. (2019). A comparison of different ciliate metabarcode genes as bioindicators for environmental impact assessments of salmon aquaculture. Journal of Eukaryotic Microbiology, 66(2), 294-308.
1391F 5′-GTACACACCGCCCGTC-3′
Euk B 5′-TGATCCTTCTGCAGGTTCACCTAC-3′
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Günther, B., Jourdain, E., Rubincam, L., Karoliussen, R., Cox, S. L., & Arnaud Haond, S. (2022). Feces DNA analyses track the rehabilitation of a free-ranging beluga whale. Scientific Reports, 12(1), 1-7.
SSUF04 GCTTGTCTCAAAGATTAAGCC
SSURmod CCTGCTGCCTTCCTTRGA