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# wrong QD value in a vcf file

Member Posts: 1

Hello,
Here is part of a vcf generated by GATK Unified Genotyper :

The first variant is filtred by the "LowQD filter" ( QD = 1.22 < 1.5) whereas it seems to be good.
Indeed : QD=QUAL/DP = 32729.73/6710 = 4.87.

When I calculate other QD for other variant in the same file, the result is good.

So, why GATK indicates a wrong QD value ?
(I did the Unified Genotyper twice, and the results are the same).