Are Read Groups (@RG tags) important when using tools like STAR, Kallisto, and Salmon for alignment?
I am trying to better understand the role of Read Groups when aligning samples to a genome with the said tools. However, I have noticed Kallisto for example doesn't even take this info into account.
What is the role of Read Groups when simply aligning RNA-Seq reads to a genome using STAR/Kallisto/Salmon? Is it crucial to have this information embedded into the BAM file? Or can it be done later after the alignment?
Would there be any potential problems that would arise if RG is not provided during alignment?
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