DRAGEN
Illumina Connected Software
  • Overview
    • Illumina® DRAGEN™ Secondary Analysis
    • DRAGEN Applications
    • Deployment Options
  • Product Guides
    • DRAGEN v4.4
      • Getting Started
      • DRAGEN Host Software
        • DRAGEN Secondary Analysis
      • Clinical Research Workflows
        • DRAGEN Heme WGS Tumor Only Pipeline
          • Quick Start
          • Sample Sheets
            • Introduction
            • Requirements
            • Templates
          • Run Planning
            • Sample Sheet Creation in BaseSpace
            • Custom Config Support
          • DRAGEN Server App
            • Getting Started
            • Launching Analysis
            • Command Line Options
            • Output
            • Advanced Topics
              • Custom Workflow
              • Custom Config Support
              • Illumina Connected Insights
          • ICA Cloud App
            • Getting Started
            • Launching Analysis
            • Advanced Topics
              • Custom Workflow
              • Custom Config Support
              • Post Processing
              • Illumina Connected Insights
          • Analysis Output
          • Analysis Methods
          • Troubleshooting
        • DRAGEN Solid WGS Tumor Normal Pipeline
          • Quick Start
          • Sample Sheets
            • Introduction
            • Requirements
            • Templates
          • Run Planning
            • Sample Sheet Creation in BaseSpace
            • Custom Config Support
          • DRAGEN Server App
            • Quick Start
            • Getting Started
            • Launching Analysis
            • Command Line Options
            • Output
            • Advanced Topics
            • Custom Workflow
              • Custom Config Support
            • Illumina Connected Insights
          • ICA Cloud App
            • Getting Started
            • Launching Analysis
            • Output
            • Advanced Topics
              • Custom Workflow
              • Custom Config Support
              • Post Processing
              • Illumina Connected Insights
          • Analysis Output
          • Analysis Methods
          • Troubleshooting
      • DRAGEN Recipes
        • DNA Germline Panel UMI
        • DNA Germline Panel
        • DNA Germline WES UMI
        • DNA Germline WES
        • DNA Germline WGS UMI
        • DNA Germline WGS
        • DNA Somatic Tumor-Normal Solid Panel UMI
        • DNA Somatic Tumor-Normal Solid Panel
        • DNA Somatic Tumor-Normal Solid WES UMI
        • DNA Somatic Tumor-Normal Solid WES
        • DNA Somatic Tumor-Normal Solid WGS UMI
        • DNA Somatic Tumor-Normal Solid WGS
        • DNA Somatic Tumor-Only Heme WGS
        • DNA Somatic Tumor-Only Solid Panel UMI
        • DNA Somatic Tumor-Only Solid Panel
        • DNA Somatic Tumor-Only Solid WES UMI
        • DNA Somatic Tumor-Only Solid WES
        • DNA Somatic Tumor-Only Solid WGS UMI
        • DNA Somatic Tumor-Only Solid WGS
        • DNA Somatic Tumor-Only ctDNA Panel UMI
        • Illumina scRNA
        • Other scRNA prep
        • RNA Panel
        • RNA WTS
      • DRAGEN Reference Support
        • Prepare a Reference Genome
      • DRAGEN DNA Pipeline
        • DNA Mapping
        • Read Trimming
        • DRAGEN FASTQC
        • Sorting and Duplicate Marking
        • Small Variant Calling
          • ROH Caller
          • B-Allele Frequency Output
          • Somatic Mode
          • Pedigree Analysis
          • De Novo Small Variant Filtering
          • Autogenerated MD5SUM for VCF Files
          • Force Genotyping
          • Machine Learning for Variant Calling
          • Evidence BAM
          • Mosaic Detection
          • VCF Imputation
          • Multi-Region Joint Detection
        • Copy Number Variant Calling
          • Available pipelines
            • Germline CNV Calling (WGS/WES)
            • Germline CNV Calling ASCN (WGS)
            • Multisample Germline CNV Calling
            • Somatic CNV Calling ASCN (WGS)
            • Somatic CNV Calling WES
            • Somatic CNV Calling ASCN (WES)
          • Additional documentation
            • CNV Input
            • CNV Preprocessing
            • CNV Segmentation
            • CNV Output
            • CNV ASCN module
            • CNV with SV Support
            • Cytogenetics Modality
        • Repeat Expansion Detection
          • De Novo Repeat Expansion Detection
        • Targeted Caller
          • CYPDB6 Caller
          • CYP2D6 Caller
          • CYP21A2 Caller
          • GBA Caller
          • HBA Caller
          • LPA Caller
          • Rh Caller
          • SMN Caller
        • Structural Variant Calling
          • Structural Variant De Novo Quality Scoring
          • Structural Variant IGV Tutorial
        • VNTR Calling
        • Population Genotyping
        • Filter Duplicate Variants
        • Ploidy Calling
          • Ploidy Estimator
          • Ploidy Caller
        • Multi Caller
        • QC Metrics Reporting
        • JSON Metrics Reporting
        • HLA Typing
        • Biomarkers
          • Tumor Mutational Burden
          • Microsatellite Instability
          • Homologous Recombination Deficiency
          • BRCA Large Genomic Rearrangment
          • DRAGEN Fragmentomics
        • Downsampling
          • Fractional (Raw Reads) Downsampling
        • Unique Molecular Identifiers
        • Indel Re-aligner (Beta)
        • Star Allele Caller
        • High Coverage Analysis
        • CheckFingerprint
        • Population Haplotyping (Beta)
        • DUX4 Rearrangement Caller
      • DRAGEN RNA Pipeline
        • RNA Alignment
        • Gene Fusion Detection
        • Gene Expression Quantification
        • RNA Variant Calling
        • Splice Variant Caller
      • DRAGEN Single Cell Pipeline
        • Illumina PIPseq scRNA
        • Other scRNA Prep
        • scATAC
        • Single-Cell Multiomics
      • DRAGEN Methylation Pipeline
      • DRAGEN MRD Pipeline
      • DRAGEN Amplicon Pipeline
      • Explify Analysis Pipeline
        • Kmer Classifier
        • Kmer Classifier Database Builder
      • BCL conversion
      • Illumina Connected Annotations
      • ORA Compression
      • Command Line Options
        • Docker Requirements
      • DRAGEN Reports
      • Tools and Utilities
    • DRAGEN v4.3
      • Getting Started
      • DRAGEN Host Software
        • DRAGEN Secondary Analysis
      • DRAGEN Reference Support
        • Prepare a Reference Genome
      • DRAGEN DNA Pipeline
        • DNA Mapping
        • Read Trimming
        • DRAGEN FASTQC
        • Sorting and Duplicate Marking
        • Small Variant Calling
          • ROH Caller
          • B-Allele Frequency Output
          • Somatic Mode
          • Joint Analysis
          • De Novo Small Variant Filtering
          • Autogenerated MD5SUM for VCF Files
          • Force Genotyping
          • Machine Learning for Variant Calling
          • Evidence BAM
          • Mosaic Detection
          • VCF Imputation
          • Multi-Region Joint Detection
        • Copy Number Variant Calling
          • CNV Output
          • CNV with SV Support
          • Multisample CNV Calling
          • Somatic CNV Calling WGS
          • Somatic CNV Calling WES
          • Allele Specific CNV for Somatic WES CNV
        • Repeat Expansion Detection
          • De Novo Repeat Expansion Detection
        • Targeted Caller
          • CYPDB6 Caller
          • CYP2D6 Caller
          • CYP21A2 Caller
          • GBA Caller
          • HBA Caller
          • LPA Caller
          • Rh Caller
          • SMN Caller
        • Structural Variant Calling
          • Structural Variant De Novo Quality Scoring
        • VNTR Calling
        • Filter Duplicate Variants
        • Ploidy Calling
          • Ploidy Estimator
          • Ploidy Caller
        • Multi Caller
        • QC Metrics Reporting
        • HLA Typing
        • Biomarkers
          • Tumor Mutational Burden
          • Microsatellite Instability
          • Homologous Recombination Deficiency
          • BRCA Large Genomic Rearrangment
          • DRAGEN Fragmentomics
        • Downsampling
          • Fractional (Raw Reads) Downsampling
          • Effective Coverage Downsampling
        • Unique Molecular Identifiers
        • Indel Re-aligner (Beta)
        • Star Allele Caller
        • High Coverage Analysis
        • CheckFingerprint
        • Population Haplotyping (Beta)
        • DUX4 Rearrangement Caller
      • DRAGEN RNA Pipeline
        • RNA Alignment
        • Gene Fusion Detection
        • Gene Expression Quantification
        • RNA Variant Calling
        • Splice Variant Caller
      • DRAGEN Single-Cell Pipeline
        • scRNA
        • scATAC
        • Single-Cell Multiomics
      • DRAGEN Methylation Pipeline
      • DRAGEN Amplicon Pipeline
      • Explify Analysis Pipeline
        • Kmer Classifier
        • Kmer Classifier Database Builder
      • DRAGEN Recipes
        • DNA Germline Panel UMI
        • DNA Germline Panel
        • DNA Germline WES UMI
        • DNA Germline WES
        • DNA Germline WGS UMI
        • DNA Germline WGS
        • DNA Somatic Tumor-Normal Solid Panel UMI
        • DNA Somatic Tumor-Normal Solid Panel
        • DNA Somatic Tumor-Normal Solid WES UMI
        • DNA Somatic Tumor-Normal Solid WES
        • DNA Somatic Tumor-Normal Solid WGS UMI
        • DNA Somatic Tumor-Normal Solid WGS
        • DNA Somatic Tumor-Only Heme WGS
        • DNA Somatic Tumor-Only Solid Panel UMI
        • DNA Somatic Tumor-Only Solid Panel
        • DNA Somatic Tumor-Only Solid WES UMI
        • DNA Somatic Tumor-Only Solid WES
        • DNA Somatic Tumor-Only Solid WGS UMI
        • DNA Somatic Tumor-Only Solid WGS
        • DNA Somatic Tumor-Only ctDNA Panel UMI
        • RNA Panel
        • RNA WTS
      • BCL conversion
      • Illumina Connected Annotations
      • ORA Compression
      • Command Line Options
      • DRAGEN Reports
      • Tools and Utilities
  • Reference
    • DRAGEN Server
    • DRAGEN Multi-Cloud
      • DRAGEN on AWS
      • DRAGEN on AWS Batch
      • DRAGEN on Microsoft Azure
        • Run DRAGEN VM on Azure
      • DRAGEN on Microsoft Azure Batch
        • Azure Batch Run Modes
    • DRAGEN Licensing
      • DRAGEN Server Licensing
      • DRAGEN Cloud Licensing
    • DRAGEN Application Manager
    • Support
    • Resource Files
      • Noise Baselines
    • Supplementary Information
    • Troubleshooting
    • Citing DRAGEN software
    • Release Notes
    • Revision History
Powered by GitBook
On this page
  • Example command lines
  • Combined CNV/SV VCF Output

Was this helpful?

Export as PDF
  1. Product Guides
  2. DRAGEN v4.4
  3. DRAGEN DNA Pipeline
  4. Copy Number Variant Calling
  5. Additional documentation

CNV with SV Support

The DRAGEN CNV caller leverages depth as its primary signal for calling copy number variants. Depth alone poses challenges for calling events that are less than 10kbp. The sensitivity of CNVs at lengths less than 10kbp can be improved by leveraging junction signals from the DRAGEN structural variant caller.

When both the DRAGEN CNV and SV caller are executed in a single invocation, then an additional integration step is done at the end of a DRAGEN run to improve the CNV calls. This feature is enabled automatically when DRAGEN detects a germline WGS analysis.

The SV/CNV Integration module takes in DEL and DUP calls from the output data structures of the germline CNV and SV callers, identifies putative matches, updates annotations, filters, scores, and outputs the refined records in a new output VCF. By leveraging junction signals from the SV caller and depth signals from the CNV caller, this approach allows for sensitive CNV detection down to 1kbp while also improving recall and precision across length scales. This is achieved by rescuing previously low quality calls if evidence is found from both callers, and also by adjusting CNV breakends to the more accurate SV breakends. The matching algorithm takes into account the proximity of the events as well as the transition states at the breakends, among other things.

Example command lines

The following is an example command line for running a germline WGS analysis for both CNV and SV.

dragen \
-r <HASHTABLE> \
--output-directory <OUTPUT> \
--output-file-prefix <SAMPLE> \
--bam-input <BAM> \
--enable-map-align false \
--enable-cnv true \
--cnv-enable-self-normalization true \
--enable-sv true \

Other optional CNV or SV parameters can also be added.

Note: There is a high sensitivity mode that can be enabled with --sv-cnv-enable-high-sensitivity-mode=true. This option is experimental and will disable many filters in the processing chain to allow for more SV+CNV calls to pass. It is recommended that users apply their own training and downstream filters when using this option.

Combined CNV/SV VCF Output

The original CNV and SV VCF output files, prior to integration, are available for users in the DRAGEN output directory, as described elsewhere. Additionally, there is an enhanced CNV VCF available with the *.cnv_sv.vcf.gz extension. The VCF header lines in the *.cnv_sv.vcf.gz mostly correspond to a concatenation of the individual header lines from the CNV and SV VCFs, with a few lines deduplicated and some new ones added. For details on the legacy header lines, please refer to the individual CNV and SV user guide sections.

Newly added header lines are described in the following table.

Header Field
Number
Type
Description

END_LEFT_BND_OF

1

String

ID of CNV whose left end is matched to the end of SV

END_RIGHT_BND_OF

1

String

ID of CNV whose right end is matched to the end of SV

LEFT_BND

1

String

ID of SV that matches the left end of CNV record

LEFT_BND_OF

1

String

ID of CNV whose left end is matched to SV

MatchSv

1

Integer

ID of original SV that was merged with CNV record

OrigCnvEnd

1

Integer

Coordinate of original CNV end

OrigCnvPos

1

Integer

Coordinate of original CNV pos

RIGHT_BND

1

String

ID of SV that matches the right end of CNV record

RIGHT_BND_OF

1

String

ID of CNV whose right end is matched to SV

SVCLAIM

A

String

Claim made by the structural variant call. Valid values are D, J, DJ for abundance, adjacency and both respectively

Records that can be matched or rescued will have annotations indicating the breakpoint linkage between a CNV and SV record. If a complete match is found, then the MatchSv annotation will be present in the record, indicating the SV record's ID field for this CNV record. Furthermore, the use of the SVCLAIM field will indicate if the record has evidence arising from depth signal D, or junction signals J, or both DJ.

Because of the mixing of standalone SV records and CNV records, the FORMAT field may have different annotations. For details on the CNV or SV specific annotations, please refer to the individual CNV and SV user guide sections.

Records that can be matched or rescued will have FILTER set to PASS. The original FILTERs are retained for records that were not matched or rescued. For example, the cnvLength FILTER will still be applied to standalone CNV records (those with SVCLAIM=D).

Example records are shown below.

# Merged record, note presence of SVCLAIM=DJ and MatchSv
chr1    24478046        DRAGEN:LOSS:chr1:24478047-24480950      N       <DEL>   150     PASS    SVLEN=-2904;SVTYPE=CNV;END=24480950;REFLEN=2904;GCP=0.482;CTP=0.472;ACP=0.508;OrigCnvPos=24477572;OrigCnvEnd=24481505;SVCLAIM=DJ;MatchSv=DRAGEN:DEL:3856:0:1:0:0:0      GT:SM:CN:BC:PE:LR       0/1:0.579268:1:3:53,60:2.3
 
# CNV record that did not match, note presence of SVCLAIM=D
chr1    109687795       DRAGEN:LOSS:chr1:109687796-109697824    N       <DEL>   20      PASS    SVLEN=-10029;SVTYPE=CNV;END=109697824;REFLEN=10029;GCP=0.492;CTP=0.524;ACP=0.472;SVCLAIM=D      GT:SM:CN:BC:PE:LR       0/1:0.543755:1:5:1,2:7.0
  
# SV record that did not match, note presence of SVCLAIM=J
chr1    75377181        DRAGEN:LOSS:chr1:75377182-75382554      N       <DEL>   150     PASS    END=75382554;SVTYPE=DEL;SVLEN=-5373;IMPRECISE;CIPOS=-394,394;CIEND=-440,440;SVCLAIM=J   GT:GQ:PL:PR:VF  0/1:430:999,0,427:29,22:29,22
PreviousCNV ASCN moduleNextCytogenetics Modality

Last updated 2 days ago

Was this helpful?