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• Introduction
  • Overview of CLC LightSpeed Module
  • Contact information
  • System requirements
  • Installing modules
    • Licensing modules
    • Uninstalling modules
  • Installing server extensions
    • Licensing server extensions
• Methods
  • Trimming
    • Quality trimming
    • Adapter trimming
  • Generating read mappings
    • Readmapping - short reads
      • Indexing
      • Read mapping and read pairs
    • Readmapping - long reads
      • Indexing
      • Read mapping
    • Deduplication
    • Local realignment
    • UMI grouping
      • Definitions
    • Primer trimming
  • Structural variant detection
  • Variant detection
    • Germline variant detection
    • Somatic variant detection
    • Tumor normal variant detection
    • Variant detection using target regions
  • Batch processing
  • Compatibility with CLC Genomics Workbench tools
  • Limitations
• Tools
  • LightSpeed Fastq to Germline Variants
    • LightSpeed Fastq to Germline Variants outputs
  • LightSpeed Fastq to Somatic Variants
    • LightSpeed Fastq to Somatic Variants outputs
  • LightSpeed Fastq to Somatic Variants Tumor Normal
    • LightSpeed Fastq to Somatic Variants Tumor Normal outputs
  • Report from LightSpeed Fastq to Variants tools
    • Summary
    • Input read QC
    • Quality trimming
    • Adapter trimming
    • Mapping statistics
  • LightSpeed Long Reads to Germline Variants (beta)
    • LightSpeed Long Reads to Germline Variants (beta) outputs
    • Genotype track
      • Getting started
      • Locus table
      • Allele table
      • Track view
      • Header view
      • Differences between Genotype tracks and Variant tracks
      • VCF compatibility
  • Report from LightSpeed Long Reads to Germline Variants
    • Summary
    • Input read QC
    • Quality trimming
    • Mapping statistics
  • Calculate TMB Score (LightSpeed)
  • Copy Number Variant Detection (WGS)
    • Copy Number Variant Detection (WGS) outputs
  • LightSpeed Utility Tools
    • Convert Genotype Track to Variant Track (beta)
    • Import VCF to Genotype Track (beta)
    • Genotype Track Amino Acid Changes (beta)
  • Prepare Sequencing Data
    • LightSpeed Demultiplex QIAseq Long Reads
      • LightSpeed Demultiplex QIAseq Long Reads outputs
  • Export genotype track to VCF
• Template Workflows
  • General Template Workflows
    • Fastq to Germline Variants (WGS)
      • Outputs from Fastq to Germline Variants (WGS)
    • Fastq to Germline Variants (WES)
      • Outputs from Fastq to Germline Variants (WES)
    • Fastq to Somatic Variants (WGS)
      • Outputs from Fastq to Somatic Variants (WGS)
    • Fastq to Somatic Variants (WES)
      • Outputs from Fastq to Somatic Variants (WES)
    • Fastq to Somatic Variants (Tumor Normal) (WGS)
      • Outputs from Fastq to Somatic Variants (Tumor Normal) (WGS)
    • Fastq to Somatic Variants (Tumor Normal) (WES)
      • Outputs from Fastq to Somatic Variants (Tumor Normal) (WES)
    • Fastq to Germline CNV Control
      • Outputs from Fastq to Germline CNV Control
    • Fastq to Somatic CNV Control
      • Outputs from Fastq to Somatic CNV Control
  • Template Workflows - QIAseq Targeted DNA
    • QIAseq Fastq to Germline Variants
      • Outputs from QIAseq Fastq to Germline Variants
    • QIAseq Fastq to Somatic Variants
      • Outputs from QIAseq Fastq to Somatic Variants
    • QIAseq Fastq to Germline CNV Control
      • Outputs from QIAseq Fastq to Germline CNV Control
    • QIAseq Fastq to Somatic CNV Control
      • Outputs from QIAseq Fastq to Somatic CNV Control
  • Template Workflows - QIAseq Targeted DNA Pro
    • QIAseq Pro Fastq to Germline Variants
      • Outputs from QIAseq Pro Fastq to Germline Variants
    • QIAseq Pro Fastq to Somatic Variants
      • Outputs from QIAseq Pro Fastq to Somatic Variants
    • QIAseq Pro Fastq to Germline CNV Control
      • Outputs from QIAseq Pro Fastq to Germline CNV Control
    • QIAseq Pro Fastq to Somatic CNV Control
      • Outputs from QIAseq Pro Fastq to Somatic CNV Control
  • Template Workflows - QIAseq xHYB Long Read
    • QIAseq xHYB Long Reads to Germline Variants (ONT) (beta)
      • Outputs from QIAseq xHYB Long Reads to Germline Variants (ONT) (beta)
    • QIAseq xHYB Long Reads to Germline Variants (PacBio) (beta)
      • Outputs from QIAseq xHYB Long Reads to Germline Variants (PacBio) (beta)
    • Guide to changing reference data
• Bibliography

Quality trimming

Raw reads are trimmed for low quality nucleotides. The method is described here: https://resources.qiagenbioinformatics.com/manuals/clcgenomicsworkbench/current/index.php?manual=Quality_trimming.html.

For LightSpeed Fastq to Germline Variants, the default quality limit used for trimming is 0.05.

For somatic variant calling, ensuring a high base quality is important. Therefore, the default quality limit has been set to 0.01 corresponding to a base quality of 20 in LightSpeed Fastq to Somatic Variants and LightSpeed Fastq to Somatic Variants Tumor Normal. This will have minimal impact on high-quality reads but can lead to markedly shorter reads and hence decreased coverage when using lower-quality reads.

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