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  • downstream analysis of pooled population samples

    It is generally recommended that pooled population samples (meaning a pool of individuals from a population sequenced without barcodes) be analyzed using SNP callers that are specific to this type of data.

    However, with the programs I have tried, (freebayes and GATK with the -ploidy tag) the output is, as expected, polyploid. So a SNP might have this as its call:
    0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/1/1/1/1/1/1/1/1/1/1:13,5:18:0:10:0.250

    Which is fine, but it is also completely incompatible with almost all downstream applications.

    The alternative of course is SNP callers that shove the allele frequency into a 0/0 0/1 1/1 basket.

    Are there programs I don't know about that work with this type of data? Is there a better way of doing these analyses?

  • #2
    I have used three programs for this task:
    Crisp (not as accurate as SNVer)
    vipR (a bit outdated, hard to install)
    SNVer (good, but very slow)

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