Video talks on 16S data analysis posted.

URMAP ultra-fast read mapper posted (paper).

~20% of taxonomy annotations in SILVA and Greengenes are wrong (paper).

Taxonomy prediction is <50% accurate for 16S V4 sequences (paper).

97% OTU threshold is wrong for species, should be 99% for full-length 16S, 100% V4 (paper).

otutab_otu_subset command

See also
OTU commands
OTU table
Making an OTU table (otutab command)

Extract a subset of OTUs from an OTU table. Input must be in QIIME classic format. The -output option gives a filename for the result.

The -labels option gives the name of a text file containing the OTU identifiers. This is a text file with one OTU identifier per line.

Example

usearch -otutab_otu_subset otutable.txt -labels otu_ids.txt -output subset.txt