Reference masking
The 'Reference masking' filters allow the user to only perform variant calling (including error model estimation) in specific regions. There are two parameters to specify this:- Ignore positions with coverage above: All positions with coverage above this value will be ignored when inspecting the read mapping for variants. The option is highly useful in cases where you have a read mapping which has areas of extremely high coverage as are areas around centromeres in whole genome sequencing applications for example.
- Restrict calling to target regions: Only positions in the regions specified will be inspected for variants.