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).

New in v11

tree_subset command

Extract a subset of a binary tree defined by a subset of labels in the tree. The output tree is the binary tree for those labels according to the branching order of the input tree.

Output is written to a tree in tabbed text format (tabbedout option) and/or Newick format (newickout option).

Example

usearch -tree_subset big.tree -labels labels.txt -newickout subset.tree