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  • Rui Guo
    Member
    • Apr 2016
    • 18

    #1

    hgap seed seletion step

    I want to know how hgap select the seed. The paper says it selects the seed with more than 20x coverage, but doesn't say how it counts the coverage.
  • rhall
    Senior Member
    • Aug 2012
    • 324

    #2
    The seed will be selected automatically if you input the expected genome size. Coverage is a simply number of bases / genome size.

    Comment

    • Rui Guo
      Member
      • Apr 2016
      • 18

      #3
      Do that mean the automatically selected seeds are long enough and has enough coverage? Does it calculate kmer frequency?

      Comment

      • gconcepcion
        Member
        • Dec 2010
        • 68

        #4
        Originally posted by Rui Guo View Post
        Do that mean the automatically selected seeds are long enough and has enough coverage? Does it calculate kmer frequency?
        HGAP is an overlap consensus based assembler and thus no kmer statistics are computed during the assembly process.

        As rhall stated, When you set up the run, you input a Genome Size (bp). The algorithm will sort the subreads by length, compute the quantity of bases necessary to obtain appropriate coverage for the Genome Size (bp) that you input during setup and select the longest data necessary to obtain the 30X coverage.

        See this for more details:
        GitHub is where people build software. More than 225 million people use GitHub to discover, fork, and contribute to over 800 million projects.
        Last edited by gconcepcion; 04-26-2016, 06:36 PM. Reason: because redundancy

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