Variant calling workflow using GATK4
For now, for simplicity, we assume that each sample is a 'platform unit'.
Usage
-
Fill out/Edit the
config.yaml
file. -
Make samplesheet. You can go to the
bin/
folder and runbash make_samples_template.sh
. -
A file named
grouped_contigs.tsv
with a column named 'name' and a second column named 'contigs' containing comma-delimited sequence names (chromosome/contig names) is needed. You may runRscript group_contigs.R
. -
qsub -q bbc bin/run_snakemake.sh
.
Workflow
Code Snippets
88 89 90 91 92 93 94 95 96 97 | shell: """ if [ `printf '{input}' | wc -w` -gt 1 ] then cat {input} > {output} else ln -sr {input} {output} fi """ |
120 121 122 123 | shell: """ fastqc --outdir {params.outdir} {input} """ |
145 146 147 148 | shell: """ fastq_screen --threads {threads} --outdir analysis/fastq_screen/ {input} """ |
171 172 173 174 | shell: """ trim_galore --paired {input} --output_dir analysis/trim_galore/ --cores {threads} --fastqc """ |
197 198 199 200 | shell: """ trim_galore {input} --output_dir analysis/trim_galore/ --cores {threads} --fastqc """ |
226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 | shell: """ bwa mem \ -t {threads} \ -R {params.bwa_RG} \ {params.bwa_idx} \ {input} | \ samblaster {params.samblaster_params} 2>{output.samblaster_err} | \ samtools sort \ -m 6G \ -@ {threads} \ -O "BAM" \ -o {output.outbam} \ - echo "END bwamem" echo "END bwamem" 1>&2 samtools index -@ {threads} {output.outbam} echo "END indexing" echo "END indexing" 1>&2 samtools idxstats {output.outbam} > {output.idxstat} echo "END idxstats" echo "END idxstats" 1>&2 """ |
276 277 278 279 280 281 282 283 284 285 286 287 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ HaplotypeCaller \ -R {params.ref_fasta} \ -I {input.bam} \ -O {output} \ -ERC GVCF \ --native-pair-hmm-threads {threads} \ {params.dbsnp} \ {params.contigs} """ |
309 310 311 312 313 314 315 316 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ GenomicsDBImport \ {params.sample_gvcfs} \ --genomicsdb-workspace-path {output.genomicsdb} \ {params.contigs} """ |
336 337 338 339 340 341 342 343 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ GenotypeGVCFs \ -R {params.ref_fasta} \ -V gendb://{params.genomicsdb} \ -O {output.vcf} """ |
365 366 367 368 369 370 371 372 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ SortVcf \ -I {input.vcf} \ -O {output.sorted_vcf} \ -SD {params.dictionary} """ |
399 400 401 402 403 404 405 406 407 408 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ MergeVcfs \ {params.in_vcfs} \ --SEQUENCE_DICTIONARY {params.dictionary} \ --OUTPUT {output.raw} vt peek -r {params.ref_fasta} {output.raw} 2> {output.vt_peek_raw} 1>>{log.stdout} """ |
452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ SelectVariants \ -R {params.ref_fasta} \ -V {input} \ --select-type-to-include {wildcards.var_type} \ -O {output.raw} echo "SelectVariants 1 done." >> {log.stdout} echo "SelectVariants 1 done." >> {log.stderr} gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ VariantFiltration \ --R {params.ref_fasta} \ --V {output.raw} \ {params.filt_params} \ -O {output.filt} echo "VariantFiltration done." >> {log.stdout} echo "VariantFiltration done." >> {log.stderr} gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ SelectVariants \ -R {params.ref_fasta} \ -V {output.filt} \ --exclude-filtered \ -O {output.pass_only} echo "SelectVariants 2 done." >> {log.stdout} echo "SelectVariants 2 done." >> {log.stderr} vt peek -r {params.ref_fasta} {output.pass_only} 2> {output.vt_peek_pass} 1>>{log.stdout} """ |
510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 | shell: """ gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ BaseRecalibrator \ -R {params.ref_fasta} \ -I {input.bam} \ --known-sites {input.known_snps_vcf} \ --known-sites {input.known_indels_vcf} \ -O {output.recal_table} echo "BaseRecalibrator done." >> {log.stdout} echo "BaseRecalibrator done." >> {log.stderr} gatk --java-options "-Xms8g -Xmx{resources.mem_gb}g -Djava.io.tmpdir=./tmp" \ ApplyBQSR \ -R {params.ref_fasta} \ -I {input.bam} \ -bqsr {output.recal_table} \ -O {output.recal_bam} echo "ApplyBQSR done." >> {log.stdout} echo "ApplyBQSR done." >> {log.stderr} """ |
554 555 556 557 558 | shell: """ qualimap bamqc -bam {input} --java-mem-size={resources.mem_gb}G --paint-chromosome-limits -outdir analysis/qualimap/{wildcards.sample} -nt {threads} """ |
585 586 587 588 589 590 591 592 593 594 595 | shell: """ # merge bcftools concat --threads {threads} --allow-overlaps -O z -o {output.merged_vcf} {input.vcfs} bcftools index --tbi --threads {threads} {output.merged_vcf} # annotate java -Xms8g -Xmx80g -Djava.io.tmpdir=./tmp -jar $SNPEFF/snpEff.jar {params.snpEff_dataDir} -v -stats {output.html} {params.snpEff_genome_id} {output.merged_vcf} | bcftools view --threads {threads} -O z -o {output.annot_vcf} - bcftools index --tbi --threads {threads} {output.annot_vcf} """ |
633 634 635 636 637 638 639 640 641 | shell: """ multiqc \ --force \ --outdir {params.workdir} \ --filename {params.outfile} \ {params.dirs} """ |
Support
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Created: 1yr ago
Updated: 1yr ago
Maitainers:
public
URL:
https://github.com/vari-bbc/variants-gatk4
Name:
variants-gatk4
Version:
1
Downloaded:
0
Copyright:
Public Domain
License:
GNU General Public License v3.0
Keywords:
- Future updates
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