SILVA
Welcome to the SILVA rRNA database project
A comprehensive on-line resource for quality checked and aligned ribosomal RNA sequence data.
SILVA provides comprehensive, quality checked and regularly updated datasets of aligned small (16S/18S, SSU) and large subunit (23S/28S, LSU) ribosomal RNA (rRNA) sequences for all three domains of life (Bacteria, Archaea and Eukarya).
SILVA are the official databases of the software package ARB.
For more background information 
Click here
SILVAngs
Check out our service for Next Generation Amplicon data
SILVA Alignment, Classification and Tree (ACT) Service
The SILVA ACT service combines alignment, search and classify as well as reconstruction of trees in a single web application.
SILVA ACT is available at: 
www.arb-silva.de/act
SILVA Tree Viewer
The SILVA Tree Viewer is a web application to browse and query the SILVA guide trees.
A technical preview is available at 
www.arb-silva.de/treeviewer.
ARB
The software package ARB represents a graphically-oriented, fully-integrated package of cooperating software tools for handling and analysis of sequence information.
The ARB project has been started more than 15 years ago by Wolfgang Ludwig at the Technical University in Munich, Germany, see 
www.arb-home.de.
UniEuk
SILVA is a member of the UniEuk project, a community-based project to achieve a universal taxonomic framework for Eukaryotes, focused primarily on protists. UniEuk is integrating information from relevant genetic markers and classical morphology-based data, validated by a comprehensive network of taxonomy experts.
Citations
Quast C, Pruesse E, Yilmaz P, Gerken J, Schweer T, Yarza P, Peplies J, Glöckner FO (2013) The SILVA ribosomal RNA gene database project: improved data processing and web-based tools. Nucl. Acids Res. 41 (D1): D590-D596.
For the taxonomic framework:
Yilmaz P, Parfrey LW, Yarza P, Gerken J, Pruesse E, Quast C, Schweer T, Peplies J, Ludwig W, Glöckner FO (2014) The SILVA and "All-species Living Tree Project (LTP)" taxonomic frameworks. Nucl. Acids Res. 42:D643-D648
SILVA Terms of Use/License Information
As of release 138 the SILVA databases, its taxonomy, and all files provided for download are licensed unter Create Commons Attribution 4.0 (CC-BY 4.0).
All data is freely available for academic and commercial use as long as SILVA is credited as original author and a link to the full license is provided.
Releases before SILVA 138 are not affected by the new license. Please refer to the license file provided in each download directory for the license associated with the provided files.
Partners
Please visit our partners. They facilitate the SILVA database project.
SILVA RSS Feed + ARB & SILVA User Group
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News
SILVAngs updated to SILVA r138.1
We have updated our amplicon analysis pipeline SILVAngs to SILVA release 138.1.
SILVA 138.1 released
SILVA 138.1 is an update of the SSU 138 full release providing corrections to the SILVA SSU taxonomy as well as updating the LSU sequence data and taxonomy to match the SSU release.
SILVAngs will be updated to 138.1 early next week.
Happy Easter and Stay Healthy
A Happy Easter from the SILVA Team. Working hard from home to get the next SILVA update release on SSU and LSU 138 done. Stay healthy to fight COVID-19 together.
Merry Christmans & Happy New Year 2020
The SILVA Team wishes you a Merry Christmas & Happy New Year. Many thanks for all your feedback and support to improve SILVA and SILVAngs. Looking forward to see you again in 2020.
User satisfaction survey
SILVA is now part of the German Network for Bioinformatics Infrastructure de.NBI.
To evaluate and improve our quality of service we need your feedback. Please help us by participating in this short survey.
SILVA SSU 138.1 update release
| SSU Parc |
SSU Ref NR 99 |
LSU Parc |
LSU Ref NR 99 |
||
|---|---|---|---|---|---|
| Minimal length | 300 | 1200/900 | 300 | 1900 | |
| Quality filtering | basic | strong | basic | strong | |
| Guide Tree | no | yes | no | yes | |
| Release date | 27.08.20 | 27.08.20 | 27.08.20 | 27.08.20 | |
| Aligned rRNA sequences | 9,469,124 | 510,508 | 1,312,534 | 95,286 |