Size selection after Covaris shearing...necessary?

[greigite]

Depends how tight of a size distribution you want. We size select post-Covaris to get a narrow distribution allowing assembly of overlapping paired-end reads. Size selection can also help you get longer read lengths since all PCR based sequencing approaches (454, Illumina) do tend to enrich for smaller fragments.

[Heisman]

For exome capture we don't do size selection. We purify with SPRI beads and that adequately removes adapter/primer-dimer.

[RNAseqer]

With a show of hands, how many people still do size selection post ligation after shearing genomic DNA by Covaris ? I've heard that many skip size selection now, but many others still size select.