Hi, qiime2 is a beginner.
I use paired-end seq data from illumina miseq.
Human intestinal microbial data is 16s ampliconsequencing.
I am curious about the workflow until OTU generation.
importing data ->qza
demultiplexing -> demux.qza
qualitycontrol
r = 3, q = 3, p = 0.75, n = o, c = 0.05 -> demux-filtered.qza
We have progressed to this point.
At what stage does cutadapt go?
How does demultiplexing replace the completed fastq file with a qza file?
Is it correct to proceed with dada2 or deblur after proceeding to the present?
demux-filtered.qza. What is the command to move dada2 to a file?
Do you proceed with merge after denoise in dada2?
What if I try to use a database other than greengene data?
Do you generate otu via vsearch with the output of dada2? What is the command? 8. What is the format of the otu file?
I am wandering a lot with the first time.
Please give detailed explanation.
Thank you.
These are all really good questions, which is why they are covered in detail in the "Moving Pictures" tutorial. This tutorial shows a full qiime 2 pipeline, and you can compare this to the pipeline you described here. I think that once you have done the "Moving Pictures" tutorial, the order of steps will be more clear. https://docs.qiime2.org/2019.1/tutorials/moving-pictures/
Next, the Deblur workflow is applied using the qiime deblur denoise-16S method. This method requires one parameter that is used in quality filtering, --p-trim-length n which truncates the sequences at position n .
I think so many of your questions will be answered when you do the tutorial! You will learn so much!