Question: Question about genotype phased PQ and PS in VCF file format 4.1
0
gravatar for Chen
3.0 years ago by
Chen770
Chen770 wrote:

In VCF file format 4.1,

genotype has two conditions unphased and phased.

What does it mean phased or unphased? Does it mean that PQ( phasing quality) is calculated or not?

And can anyone give an example about PS (phase set)? Because I tried many variant calling tools but fail to get any PS information, what would PS info looks like?

phased snp genotype vcf • 999 views
ADD COMMENTlink modified 3.0 years ago by mastal5112.0k • written 3.0 years ago by Chen770
0
gravatar for mastal511
3.0 years ago by
mastal5112.0k
mastal5112.0k wrote:

According to the VCF format 4.1 and 4.3 specifications, it sounds like they haven't decided on a specified way of defning PQ, so the PQ tag is reserved for future use. So phased/unphased doesn't refer to whether or not PQ has been calculated.

PS is supposed to be a 32-bit integer.

This article may help to explain what phased means in relation to genotypes. http://www.chromosomechronicles.com/2009/09/08/phasing-determining-which-snps-are-inherited-together/

ADD COMMENTlink written 3.0 years ago by mastal5112.0k
Please log in to add an answer.

Help
Access

Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
Powered by Biostar version 2.3.0
Traffic: 2494 users visited in the last hour