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Pindel -M Option Is Confusing Me

Hi, I am running Pindel on with the -M option set to 30. According to Pindel documentation:

-M/--minimum_support_for_event Pindel only calls events which have this number or more supporting reads (default 3)

It was my understanding that a variant call would need at least 30 supporting reads for that call and would therefore also have a read depth of atleast 30. however, my resulting vcfs contain many calls that have a depth much lower than 30. For example this excerpt from a call on a multiple sample (3 samples) run:

GT:AD .:0 1/.:10 1/.:24

None of these have a depth >= 30... Does anyone have an explanation for this?

Thank you

pindel

1 answer

Your example has 34 total reads covering that position. Much of the impetus for multisample calling is the ability to use information from multiple samples in making calls.

thank you. This would also explain why I have so many more calls when I run Pindel with more samples!

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