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Hi , I'am new to NGS and have a questions reagarding the filtering. I have 13 individuals, 3 of them with a coverage of 11x-15x, the rest with a coverage of 5x-7x. I did multi-sample SNPcalling and hard filtering, the latter as there are no known SNPs so far. Now I am not sure how to set the minimal SNP quality (QUAL). On the best practise it is suggested to juse at least 30 for individuals with a coverage of at least 30, but 4 if the coverage is below 10. So what is the best way to set the QUAL filter?
many thanks in advance