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
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.
The MEGX.net data portal
Visit our partner site 
www.megx.net, the data portal for Marine Ecological Genomix, to get a feeling how your research can be improved using integrated databases.
SILVA Terms of Use/License Information
SILVA uses a dual licensing model. In short, browsing and deploying the SILVA database content displayed on the SILVA webportal is free for all (academic and non-academic users) whereas all downloads are only free for academic users. Both, academic and non-academic users should have a look at the 
SILVA Terms of Use/License Information for more details.
SILVA RSS Feed + ARB & SILVA User Group
- Subscribe to our RSS Feed
to get the latest News. - Stay up to date and follow the discussions of the ARB/SILVA community by subscribing to the Yahoo ARB & SILVA User Group.
Partners
Please visit our partners. They facilitate the SILVA database project.
News
Meet ARB & SILVA at VAAM 2013
Talk to the ARB and SILVA developers at VAAM 2013 (10.03-13.03) in Bremen, Germany. Follow the link to see the sessions where you will find us.
LTP 111 released
Version 111 of the "All Species Living Tree" (LTP) has been released. Check the project website (link above) for more information ...
ARB & SILVA at Biosystematics 2013
Join us at the Software Bazar at Biosystematics in Vienna, February 18-22, 2013.
SILVA Stickers have arrived!
If you like one - contact us. We are happy to ship them to you.
SILVA 111 - full release
| SSU Parc | SSU Ref | SSU Ref NR | LSU Parc | LSU Ref | |||
|---|---|---|---|---|---|---|---|
| Minimal length | 300 | 1200/900 | 1200/900 | 300 | 1900 | ||
| Quality filtering | basic | strong | strong | basic | strong | ||
| Guide Tree | no | yes | yes | no | yes | ||
| Release version | 111 | 111 | 111 | 111 | 111 | ||
| Release date | 27.07.12 | 27.07.12 | 27.07.12 | 27.07.12 | 27.07.12 | ||
| Aligned rRNA sequences | 3,194,778 | 739,633 | 286,858 | 288,717 | 29,306 |
SILVA 114 - web release (Ref datasets and ARB files not updated)
| SSU | LSU | |
|---|---|---|
| Release date | 23.01.2013 | 23.01.2013 |
| Aligned rRNA sequences | 3,672,787 | 342,248 |
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.
If you use SINA please cite:
Pruesse, E, Peplies, J and Glöckner, FO (2012) SINA: accurate high-throughput multiple sequence alignment of ribosomal RNA genes. Bioinformatics, 28, 1823-1829