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  • Dual-index vs single index

    What would be the benefit from using 2 x 8bp dual indexes vs say... 1 x 16bp single index for a paired end read?
    Last edited by Ingeneious; 01-16-2015, 05:07 PM.

  • #2
    One good reason is to identify barcode swapping between samples that can happen during PCR:

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    • #3
      How many adapters or primers would you need for each of those scenarios to identify a given number of samples?
      Providing nextRAD genotyping and PacBio sequencing services. http://snpsaurus.com

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      • #4
        Originally posted by atcghelix View Post
        One good reason is to identify barcode swapping between samples that can happen during PCR:

        http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3245947/
        Thanks, this makes sense. According to the paper, it looks like contamination is also an issue, if you pool after PCR.

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        • #5
          I think SNPsaurus's point is more important, however. You can get by with far fewer distinct adapters by using the combinatorial aspects of a two-index system.

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