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  • #1

    Ask for help! GATK iteration~

    Hi,
    I recently used several aligners to do the tests for SNPs calling. Without any iteration step, the bowtie2-local-very sensitive performed better than bwa. It could call more real SNPs than both bwa and smalt. But after the iteration steps, bowtie2 only yielded a few SNPs and lost many real ones. With the same default recalibration parameters, SNPs based on bwa alignment were very constant after 5 iterations.
    Can you guys help me to figure it out? How can I keep more SNPs based on bowtie2 alignment after iterations?
    Thanks in advance!

    Wei
    Tags: gatk, iteration, snp filtering
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