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  • santy
    Junior Member
    • Mar 2010
    • 2

    #1

    Quality triming of Solid reads in BWA

    Hi All

    I use BWA to map Solid reads (Genomic) to reference. Normaly I used -q parameter to trim low quality end of reads (This significantly improve mapped read %).

    I have two problems, are they bugs in BWA.
    1. BWA dosent do soft triming of Solid reads it allways dose hard trim.
    2. for Unmapped reads it trims only reads but dosent trim quality value. Which results in error (sequence and quality missmatch) when I use samtools or Picard for post processing.

    I extensively use BWA for Illumina reads and it never gave these problems. It only occure when I use BWA for Solid reads.

    Dose any one get same problem and if yes whats the solution.
  • colindaven
    Senior Member
    • Oct 2008
    • 417

    #2
    Sounds like a bug, I think solid support for BWA was only introduced much later. Why don't you let the author know via a bug post on Sourceforge ?

    Comment

    • lh3
      Senior Member
      • Feb 2008
      • 686

      #3
      Please do not use -q for solid reads. Also, solid reads should not be trimmed in the same way as illumina reads -- they have quite different error profiles.

      Comment

      • carmeyeii
        Senior Member
        • Mar 2011
        • 137

        #4
        lh3,

        would you care to elaborate on this topic?

        Thanks,
        Carmen

        Comment

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