Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • jdpr_100
    Member
    • Jun 2014
    • 14

    #1

    How to filter out SNPs with Minor allele frequency less than 5% in VCF file

    Hello,
    I would like to filter out SNPs with allele frequencies in VCF file from multi-sample variant calling.
    I tried VCFtools with the following commands, but it doesn't work.
    vcftools --vcf input.vcf --recode --recode-INFO-all --stdout --maf 0.05 --max-maf 1 --out outpur.vcf
    Here is the vcf file format generated from samtools mpileup.
    #CHROM POS ID REF ALT QUAL FILTER INFO FORMAT 788 712 908 544 541 581 801 381 479 487 379 570
    Chr01 11356 . C A 124 . DP=88;VDB=1.624097e-04;RPB=-2.346857e+00;AF1=0.1553;AC1=3;DP4=75,3,10,0;MQ=30;FQ=124;PV4=1,1,1,1
    GT:PLP:GQ 0/0:0,0,0:0:5 0/0:0,6,59:2:11 0/0:0,0,0:0:5 0/1:28,0,123:8:24 1/1:157,24,0:8:14 0/0:0,39,221:13:43 0/0:0,12,85:4
    :17 0/0:0,36,164:12:40 0/0:0,39,147:13:43 0/0:0,9,71:3:14 0/0:0,48,163:16:52 0/0:0,27,126:9:31
    Chr01 11384 . T C 15.9 . DP=123;VDB=5.617680e-03;RPB=1.820871e+00;AF1=0.04721;AC1=1;DP4=114,3,5,0;MQ=31;FQ=16.1;PV4=1,1,0.05,1 GT:PLP:GQ 0/0:0,12,79:4:22 0/0:0,6,60:2:16 0/0:0,0,0:0:10 0/0:0,30,163:10:40 0/0:0,27,159:9:37 0/0:0,60,244:20:70 0/0:0,12,85:4:22 0/0:0,48,163:16:58 0/1:56,0,116:15:46 0/0:0,18,122:6:28 0/0:0,69,185:23:79 0/0:0,39,135:13:49
    I wonder if anyone could help me
    Thanks
  • swbarnes2
    Senior Member
    • May 2008
    • 910

    #2
    The DP4 part spells out how many reads aligned to reference and alternate allele. So you can parse based on that. You could do that with some finagling in Excel, if you had to.

    Comment

    Latest Articles

    Collapse

    • SEQadmin2
      16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
      by SEQadmin2




      NGS has revolutionized clinical microbiology by offering new ways to identify and surveil pathogens without prior knowledge of the target. One popular approach is 16S rRNA and ITS amplicon sequencing, which targets specific microbial markers. But studies are increasingly incorporating shotgun metagenomics, a technique that sequences all DNA from a sample without targeting specific microbial markers. This approach allows more detailed taxonomic classification, detection...
      Today, 06:46 AM
    • SEQadmin2
      Multiomic Liquid Biopsy: What DNA/RNA Panels Reveal That DNA Alone Can’t
      by SEQadmin2



      Tumors contain complex mixtures of cell populations that evolve in response to treatment and host-specific factors. Tissue biopsies provide only static snapshots of a tumor’s state. But what if we could follow that evolution over time using a minimally invasive technique?

      Liquid biopsies can detect tumor-derived material circulating in the bloodstream, providing a way to study treatment response, detect emerging resistance, and discover new biomarkers. Circulating
      ...
      10-14-2026, 09:55 AM

    ad_right_rmr

    Collapse

    News

    Collapse

    Topics Statistics Last Post
    Started by SEQadmin2, 10-28-2026, 09:57 AM
    0 responses
    22 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 10-28-2026, 09:51 AM
    0 responses
    15 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 10-22-2026, 11:13 AM
    0 responses
    68 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 10-22-2026, 10:48 AM
    0 responses
    48 views
    0 reactions
    Last Post SEQadmin2  
    Working...