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  • aurelielaugraud
    Member
    • Aug 2009
    • 37

    #1

    bwa

    Dear all,
    Using bwa, I would like to select only reads that I am very sure about ...
    it is to say, reads that have unique match (mismatch would be allowed as SNP are too frequent to consider the no-mismatch option, however, I am considering putting a limit but I don't really know which one, my reads are 75 bp illumina for the moment.)
    I am trying to think to some solution regarding paired-ends : should both paired-ends be unique match, only one ? to be kept as very sure mapped reads.
    I am not quite sure if I should play with bwa option to restrict the search or if I should use the sam format (I will probably need some help with the flag thing, it has been quite a while since I had a look at this) to select afterwards (if we consider that calculation time is not a problem ...) .
    I would really appreciate comments, ideas and help

    thanks a lot
  • lh3
    Senior Member
    • Feb 2008
    • 686

    #2
    Set a cutoff on mapping quality. See also:

    Download SAM tools for free. SAM (Sequence Alignment/Map) is a flexible generic format for storing nucleotide sequence alignment. SAMtools provide efficient utilities on manipulating alignments in the SAM format.

    Comment

    • aurelielaugraud
      Member
      • Aug 2009
      • 37

      #3
      thanks a lot

      Comment

      • aurelielaugraud
        Member
        • Aug 2009
        • 37

        #4
        thanks lh3, where can I get some documentation about the mapping quality score (range, "stringentness" ...?

        Comment

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