VSEARCH 2.22.1

Add the derep_smallmem command for dereplication with less memory usage. Remove compiler warnings.

VSEARCH 2.21.2

Fix problems with the --lcaout option.

VSEARCH 2.21.1

Fix dereplication with empty input file.

VSEARCH 2.21.0

This version adds the sample, qsegout and tsegout options. It also enables the use of UDB databases with uchime_ref.

VSEARCH 2.20.1

Fix hang in fastq_mergepairs with multiple threads.

VSEARCH 2.20.0

Added the fastx_uniques command and the fastq_qout_max option for dereplication of FASTQ files. Some code cleaning.

VSEARCH 2.19.0

Added the lcaout and lca_cutoff options to enable the output of last common ancestor (LCA) information about hits when searching. The randseed option was added as a valid option to the sintax command. Code improvements.

v2.18.0

Added the fasta2fastq command. Fixed search bug on ppc64le. Fixed bug with removal of size and ee info in uc files. Fixed compilation errors in some cases. Made some general code improvements. Updated manual.

VSEARCH 2.17.1

Modernized code. Minor update to help info.

VSEARCH 2.17.0

The fastq_mergepairs command has been changed. It now allows merging of sequences with overlaps as short as 5 bp if the --fastq_minovlen option has been adjusted down from the default 10. In addition, much fewer pairs of reads should now be rejected with the reason 'multiple potential alignments' as the algorithm for detecting those have been changed. The orient command has also been improved.