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        MultiQC: Summarize analysis results for multiple tools and samples in a single report
        Philip Ewels, Måns Magnusson, Sverker Lundin and Max Käller
        Bioinformatics (2016)
        doi: 10.1093/bioinformatics/btw354
        PMID: 27312411
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        About MultiQC

        This report was generated using MultiQC, version 1.35

        MultiQC is published in Bioinformatics:

        MultiQC: Summarize analysis results for multiple tools and samples in a single report
        Philip Ewels, Måns Magnusson, Sverker Lundin and Max Käller
        Bioinformatics (2016)
        doi: 10.1093/bioinformatics/btw354
        PMID: 27312411

        MultiQC is developed by Seqera.

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        A modular tool to aggregate results from bioinformatics analyses across many samples into a single report.

        Report generated on 2026-05-28, 10:49 CST based on data in: /home/kyhan/test/rna-seq/yeast-standard-out/03_results/alignment_qc

        General Statistics

        Showing 24/24 rows and 3/9 columns.
        Sample Name5'-3' biasM AlignedExonicIntronicIntergenicOverlapping ExonReadsReads mapped% Reads mapped
        SNF2KO_01
        1.25
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.5%
        SNF2KO_02
        1.82
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.2%
        SNF2KO_03
        2.54
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.1%
        SNF2KO_04
        1.07
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        98.6%
        SNF2KO_05
        1.17
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.0%
        SNF2KO_06
        1.70
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        96.9%
        SNF2KO_07
        1.64
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        96.8%
        SNF2KO_08
        1.70
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        96.8%
        SNF2KO_09
        2.11
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.1%
        SNF2KO_10
        3.11
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.1%
        SNF2KO_11
        1.12
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        96.5%
        SNF2KO_12
        1.00
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.5M
        97.3%
        WT_01
        3.23
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        96.9%
        WT_02
        1.51
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.4%
        WT_03
        3.66
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        96.5%
        WT_04
        1.17
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.5%
        WT_05
        1.93
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.3%
        WT_06
        1.57
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.8%
        WT_07
        1.82
        0.5M
        0.4M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.4%
        WT_08
        2.32
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.4%
        WT_09
        10.15
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.6%
        WT_10
        1.60
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.2%
        WT_11
        6.38
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.5%
        WT_12
        1.84
        0.5M
        0.3M
        0.0M
        0.0M
        0.0M
        0.6M
        0.6M
        97.0%
        Expand table

        QualiMap

        RNASeq: 2.3

        Quality control of alignment data and its derivatives like feature counts.http://qualimap.bioinfo.cipf.esDOI: 10.1093/bioinformatics/btv566; 10.1093/bioinformatics/bts503

        Genomic origin of reads

        Classification of mapped reads as originating in exonic, intronic or intergenic regions. These can be displayed as either the number or percentage of mapped reads.

        There are currently three main approaches to map reads to transcripts in an RNA-seq experiment: mapping reads to a reference genome to identify expressed transcripts that are annotated (and discover those that are unknown), mapping reads to a reference transcriptome, and de novo assembly of transcript sequences (Conesa et al. 2016).

        For RNA-seq QC analysis, QualiMap can be used to assess alignments produced by the first of these approaches. For input, it requires a GTF annotation file along with a reference genome, which can be used to reconstruct the exon structure of known transcripts. This allows mapped reads to be grouped by whether they originate in an exonic region (for QualiMap, this may include 5′ and 3′ UTR regions as well as protein-coding exons), an intron, or an intergenic region (see the Qualimap 2 documentation).

        The inferred genomic origins of RNA-seq reads are presented here as a bar graph showing either the number or percentage of mapped reads in each read dataset that have been assigned to each type of genomic region. This graph can be used to assess the proportion of useful reads in an RNA-seq experiment. That proportion can be reduced by the presence of intron sequences, especially if depletion of ribosomal RNA was used during sample preparation (Sims et al. 2014). It can also be reduced by off-target transcripts, which are detected in greater numbers at the sequencing depths needed to detect poorly-expressed transcripts (Tarazona et al. 2011).

        Created with MultiQC

        Gene Coverage Profile

        Mean distribution of coverage depth across the length of all mapped transcripts.

        There are currently three main approaches to map reads to transcripts in an RNA-seq experiment: mapping reads to a reference genome to identify expressed transcripts that are annotated (and discover those that are unknown), mapping reads to a reference transcriptome, and de novo assembly of transcript sequences (Conesa et al. 2016).

        For RNA-seq QC analysis, QualiMap can be used to assess alignments produced by the first of these approaches. For input, it requires a GTF annotation file along with a reference genome, which can be used to reconstruct the exon structure of known transcripts. QualiMap uses this information to calculate the depth of coverage along the length of each annotated transcript. For a set of reads mapped to a transcript, the depth of coverage at a given base position is the number of high-quality reads that map to the transcript at that position (Sims et al. 2014).

        QualiMap calculates coverage depth at every base position of each annotated transcript. To enable meaningful comparison between transcripts, base positions are rescaled to relative positions expressed as percentage distance along each transcript (0%, 1%, …, 99%). For the set of transcripts with at least one mapped read, QualiMap plots the cumulative mapped-read depth (y-axis) at each relative transcript position (x-axis). This plot shows the gene coverage profile across all mapped transcripts for each read dataset. It provides a visual way to assess positional biases, such as an accumulation of mapped reads at the 3′ end of transcripts, which may indicate poor RNA quality in the original sample (Conesa et al. 2016).

        The Normalised plot is calculated by MultiQC to enable comparison of samples with varying sequencing depth. The cumulative mapped-read depth at each position across the averaged transcript position are divided by the total for that sample across the entire averaged transcript.

        Created with MultiQC

        RSeQC

        Evaluates high throughput RNA-seq data.http://rseqc.sourceforge.netDOI: 10.1093/bioinformatics/bts356

        Read Distribution

        Read Distribution calculates how mapped reads are distributed over genome features.

        Created with MultiQC

        Infer experiment

        Infer experiment counts the percentage of reads and read pairs that match the strandedness of overlapping transcripts. It can be used to infer whether RNA-seq library preps are stranded (sense or antisense).

        Created with MultiQC

        Bam Stat

        All numbers reported in millions.

        Created with MultiQC

        Samtools

        Toolkit for interacting with BAM/CRAM files.http://www.htslib.orgDOI: 10.1093/bioinformatics/btp352

        Flagstat

        This module parses the output from samtools flagstat

        Created with MultiQC

        Flagstat: Percentage of total

        This module parses the output from samtools flagstat

        Created with MultiQC

        Mapped reads per contig

        The samtools idxstats tool counts the number of mapped reads per chromosome / contig. Chromosomes with < 0.1% of the total aligned reads are omitted from this plot.

        Created with MultiQC

        Software Versions

        Software Versions lists versions of software tools extracted from file contents.

        GroupSoftwareVersion
        QualiMapRNASeq2.3