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  • nkline
    Member
    • Jun 2013
    • 15

    #1

    Can Bowtie 0.12.7 handle Sanger / Illumina 1.9 ?

    Hello. I have a user that needs to use Bowtie 0.12.7 (Yeah, old version. Don't ask.) but the quality score format of our FASTQ files is Sanger / Illumina 1.9.

    According to https://en.wikipedia.org/wiki/FASTQ_format#Encoding , Illumina 1.8+ introduces a 41st score (letter "J"). And according to that article:

    various scripts and tools break when they encounter data with quality values larger than 40
    With that in mind, I see this version of Bowtie defaults to:
    Code:
    --phred33-quals    input quals are Phred+33 (default)
    So my questions are:

    1. Will Bowtie 0.12.7 know how to handle the 41st score (letter "J")?

    2. If not, where can I find a command-line version of a FASTQ Groomer, like the one in Galaxy?

    I appreciate your help.
  • GenoMax
    Senior Member
    • Feb 2008
    • 7142

    #2
    For reference cross-posted: https://www.biostars.org/p/180855/

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