Contents
What is MQ in VCF file?
MQ is the mapping quality, which is the fifth column in SAM record. QUAL, meanwhile, is the base quality score, which is derived from the 11th column in SAM record. MQ is typically an indication of how unique the region’s sequence is, the higher the MQ, the more unique the sequence.
What is contig in VCF?
Updates the reference contigs in the header of the VCF format file, i.e. the reference dictionary, using the dictionary from a variant, alignment, reference, or dictionary file. The dictionary lines start with ‘##contig=’.
What is MQRankSum?
7. MappingQualityRankSumTest (MQRankSum) This is the u-based z-approximation from the Rank Sum Test for mapping qualities. It compares the mapping qualities of the reads supporting the reference allele and the alternate allele.
What does VCF file look like?
VCF is a text file format (most likely stored in a compressed manner). It contains meta-information lines, a header line, and then data lines each containing information about a position in the genome. The format also has the ability to contain genotype information on samples for each position.
What are VCF files used for?
A vCard enables you to send contact information in a format that can be easily read in other e-mail programs. A vCard is saved as a . vcf file, which is the Internet standard for sharing contact information.
What should a VCF file look like?
What is DeepVariant?
DeepVariant is an analysis pipeline that uses a deep neural network to call genetic variants from next-generation DNA sequencing data.
Which is an example of a VCF file?
Additional information on the VCF format is available. 0. Example VCF is a text file format (most likely stored in a compressed manner). It contains meta-information lines, a header line, and then data lines each containing information about a position in the genome.
When to include meta-information in a VCF file?
File meta-information is included after the ## string, often as key=value pairs. The ‘fileformat’ field is always required and should detail the VCF format version number. For example, for VCF version 4.0, this line should read:
What should be included in VCF version 4.0?
For example, for VCF version 4.0, this line should read: It is strongly encouraged that information lines describing the INFO, FILTER and FORMAT entries used in the body of the VCF file be included in the meta-information section. Although they are optional, if these lines are present then they must be completely well-formed.
Where can I find the VCF format spec?
The VCF specification used to be maintained by the 1000 Genomes Project, but its management and further development has been taken over by the Genomic Data Toolkit team of the Global Alliance for Genomics and Health. The full format spec can be found in the Samtools/Hts-specs repository, along with other useful specifications like SAM/BAM/CRAM.