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 new service for Next Generation Amplicon data
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
SILVA follows a dual licensing model. In short, browsing the content of the SILVA webportal (including results of the data analysis services) and deploying this information is free for all users. Any downloads provided are free for ACADEMIC users. Redistribution of these downloads or their derivates requires a reference to the official SILVA license terms. NON-ACADEMIC users need to acquire a SILVA Commercial License for utilisation of any downloads provided. For the full text and how to acquire a commercial license, please refer to the 
SILVA Terms of Use/License Information
Partners
Please visit our partners. They facilitate the SILVA database project.
SILVA RSS Feed + ARB & SILVA User Group
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News
The 7th de.NBI Quaterly Newsletter published
The Quarterly Newsletter Edition March 2017 contains information on two meetings, the 2nd Scientific Advisory Board Meeting and the de.NBI Plenary Meeting both organized last year in Berlin. Furthermore, the newsletter deals with series of interesting topics like interactions with ELIXIR, establishment of the de.NBI cloud and organization of two de.NBI summer schools in 2017. It also contains information on events like the Midterm Review and the de.NBI Symposium.
The "All Species Living Tree" version 128 released
The new version of the "All Species Living Tree" based on SILVA release 123 for LSU and 128 for SSU has been released.
QIIME files for SILVA release 128 have arrived
Many thanks to Tony Walkers for providing us with the QIIME 128 release files.
Merry Christmas and a Happy New Year
The SILVA Team wishes you a Merry Christmas and a Happy New Year. Many thanks for your constructive feedback and cooperation to help us improving SILVA and SILVAngs. Looking forward to see you again in 2017.
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 / LSU 128 - full release
| SSU Parc | SSU Ref | SSU Ref NR 99 | LSU Parc | LSU Ref | |||
|---|---|---|---|---|---|---|---|
| Minimal length | 300 | 1200/900 | 1200/900 | 300 | 1900 | ||
| Quality filtering | basic | strong | strong | basic | strong | ||
| Guide Tree | no | no | yes | no | yes | ||
| Release date | 28.09.16 | 28.09.16 | 28.09.16 | 28.09.16 | 28.09.16 | ||
| Aligned rRNA sequences | 5,616,941 | 1,922,213 | 645,151 | 735,238 | 154,297 |