5/1/2019: UPDATE - an issue was identified where underscores in the UNITE ITS IDs were converted to spaces when loaded into QIIME 2. This caused diversity analysis failure due to mismatches in IDs with spaces and underscores. All previous trees have been repaired. Putting IDs into single quotes fixed this. ID_12345 -> 'ID_12345'.

The software still needs to be fixed to handle this, but these pre-made trees are good to go!

In this repository, you can see multiple folders for ghost trees created using SILVA 18S foundation database (SILVA 132) and a UNITE ITS extensions database. The most current SILVA 18S database was used when the ghost trees were created.

Here is an example of results you can achieve with ghost-tree:

Fig 1. Saliva (blue) and restroom (red) ITS sequences compared using A) binary jaccard, B) unweighted UniFrac with Muscle aligned ITS sequences, and C) unweighted UniFrac with a ghost-tree produced tree.

Please cite our software publication in Microbiome if you use ghost-tree.

J. Fouquier, J.R. Rideout, E. Bolyen, J. Chase, A. Shiffer, D. McDonald, R. Knight, J.G. Caporaso, and S.T. Kelley. ghost-tree: creating hybrid-gene phylogenetic trees for diversity analysis. Microbiome. (February 2016) DOI: 10.1186/s40168-016-0153-6

For more information see the QIIME 2 ghost-tree community tutorial or read our paper in Microbiome.

Misc. links:

Silva

UNITE

QIIME 2 docs

As always, if you have any questions, please post on the QIIME 2 forum section for plugins (preferred) or email me directly at jennietf (at) gmail if you're shy :)