Clarification with vcf file
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25 days ago
Nesma • 0

**Hello everyone, I've been trying to generate vcf files for my samples. I did a single sample as a start just to see if everything is going well. could you please take a look at the output and let me know if you see anything strange? (I'm a beginner and this my first time generating a vcf file) Is it normal that the quality score is the same for all sites? This is the output of command:

head -n 50 1_16_variants.vcf
 NC_007795.1    62  .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 66  .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 89  .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 93  .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 137 .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 152 .   T   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 199 .   T   C   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 205 .   G   C   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 210 .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 358 .   T   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 393 .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 411 .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 467 .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 621 .   T   C   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 735 .   T   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 805 .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 903 .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 915 .   T   C   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1194    .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1197    .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1281    .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1308    .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1320    .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1689    .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1917    .   C   T   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 1924    .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 2011    .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 2269    .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 2593    .   G   A   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1
NC_007795.1 2605    .   A   G   30.4183 .   DP=1;SGB=-0.379885;MQ0F=0;AC=2;AN=2;DP4=0,0,1,0;MQ=60   GT:PL:DP    1/1:60,3,0:1

And these are the commands I used:

bwa index GCF_000013425.1_ASM1342v1_genomic.fna

bwa mem GCF_000013425.1_ASM1342v1_genomic.fna 1-16_S7_L001.fasta | samtools view -O BAM - | samtools sort -T temp -O bam -o 1-16.sorted.bam –

samtools index 1-16.sorted.bam

picard MarkDuplicates I=1-16.sorted.bam O=1-16.markdup.bam M=1-16.metrics.txt

command proceeded succefully but this message appeared:

You may need to specify a READ_NAME_REGEX in order to correctly identify optical duplicates

samtools index 1-16.markdup.bam

samtools stats 1-16.markdup.bam > 1-16.markdup.stats

plot-bamstats -p 1-16_plot/ 1-16.markdup.stats

the following error occurs:

set terminal png size 600,400 truecolor
"1-16_plot/quals.gp", line 2: unknown or ambiguous terminal type; type just 'set terminal' for a list
The command exited with non-zero status 256:
        gnuplot 1-16_plot/quals.gp
 at /home/manager/miniconda2/bin/plot-bamstats line 51.
        main::error("The command exited with non-zero status 256:\x{a}\x{9}gnuplot 1-16_pl"...) called at /home/manager/miniconda2/bin/plot-bamstats line 336
        main::plot("1-16_plot/quals.gp") called at /home/manager/miniconda2/bin/plot-bamstats line 682
        main::plot_qualities(HASH(0x5621b0a46cf8)) called at /home/manager/miniconda2/bin/plot-bamstats line 33

samtools mpileup -t DP -Bug -m 4 -f GCF_000013425.1_ASM1342v1_genomic.fna 1-16.markdup.bam > 1-16_variants.bcf

bcftools call -mv -O v -o  1-16_variants.vcf 1-16_variants.bcf
command proceeded but this message appeared:
Note: none of --samples-file, --ploidy or --ploidy-file given, assuming all sites are diploid

Apologies for the inconvenience.

quality vcf VCF score • 417 views
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I didn't know I'm sorry, I think I fixed it

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let me know if you see anything strange?

the depth DP at all your sites is only '1'

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