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coverage depth & SNP-calls

mahyarheymahyarhey BostonMember

In the following small table you can see the relationship of SNP-calls with coverage_depth (DP) for 34 samples. SNP calls extracted from Haplotype_caller module of GATK. As it can bee seen by increasing DP the number of SNP-calls to be decreased. However, my expectation was in opposite. Is there any explanation? Thanks

Call-SNP DP
39263 3
34950 4
21228 5
17878 6
13249 7
10913 8
8891 9
7484 10
6126 11
5165 12
4336 13
3807 14
3240 15
2975 16
2636 17
2347 18
2222 19
2046 20

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