[mira_talk] Re: 90% Roche454 reads going to debris file...help please !!

  • From: Bastien Chevreux <bach@xxxxxxxxxxxx>
  • To: mira_talk@xxxxxxxxxxxxx
  • Date: Thu, 6 Oct 2011 22:58:01 +0200

On Thursday 06 October 2011 18:07:28 jyotsna guleria wrote:
> Can someone please help me in understanding what is going wrong by looking
> at the logfile uploaded at :
> All of my reads are going into debris list, I am not able to understand
> why....


1. wrong command line. Do not write
     mira --project=... --job=... [some options] --highlyrepetitive ...
   but
     mira --project=... --job=... --highlyrepetitive [other options] ...

   "--highlyrepetitive" is a position dependend parameter, look that up in the 
documentation.


2. any special reason you switch of proposed end clipping? (-CL:pec=no)

3. -SK:nrr=10 might be one cause for your problem. Almost every read has some
    kind of probelamtic stretch, see the log line:

    "Writing read repeat info to:
     JCV345MDA_assembly/JCV345MDA_d_info/JCV345MDA_info_readrepeats.lst ...
     3289 sequences with 8201 masked stretches."

   Such a tiny project with 4k reads does not need that.

4. Only 1/3 of the reads is finally used in the assembly. See log lines

     Building new contig 1
     Localtime: Thu Oct  6 16:23:12 2011
     Unused reads: 1514
   The rest did not have any kind of overlaps. See again -SK:nrr


B.

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