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DP=0 in VCF
i've run the HaplotypeCaller on single sample, and got a few variants in the VCF file that had only 3 fields in FORMAT:
GT:GQ:PL (instead of five: GT:AD:DP:GQ:PL). when i look at the the INFO field, i see that their "DP=0", and indeed there was no coverage at their positions (by looking at teh BAM file in IGV).
if the DP=0, then why and how these variants were called?
what can i learn about them?
Thanks for your help