# Qiime2 import fastq

**URL:** <https://forum.qiime2.org/t/qiime2-import-fastq/2320>\
**Category:** User Support\
**Tags:** dada2, joining, import, deblur\
**Created:** [December 24, 2017, 6:30pm UTC](https://forum.qiime2.org/t/qiime2-import-fastq/2320 "2017-12-24T18:30:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hongweiyin](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/h/b38774/32.png) [@hongweiyin](https://forum.qiime2.org/u/hongweiyin)\
**Post date:** [December 24, 2017, 6:30pm UTC](https://forum.qiime2.org/t/qiime2-import-fastq/2320/1 "2017-12-24T18:30:37Z")

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I am a new Qiime 2 user and I am attempting to import joined fastq files (this means that I have only one fastq per sample that includes R1+R2 joined).[新建文本文档 (2).txt](https://cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/qiime21/original/1X/dc45de56b21545936f806dea93d3a1cd1042b29b.txt) (1.3 KB)  
This is my fastq file with BarcodeSequence and LinkerPrimerSequence,also i have a mapping flie li[emapping.txt](https://cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/qiime21/original/1X/ff7c3d5c4dc02f83f19cf8d4866a2a2be17dfb66.txt) (510 Bytes)  
ke  
i am confused which do i choose for my data importing to qiime2 ,and also if i can use dada in the next analysis .  
How can I import my FASTQ file?  
Thank you very much

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**Author:** ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)\
**Post date:** [December 28, 2017, 3:51am UTC](https://forum.qiime2.org/t/qiime2-import-fastq/2320/3 "2017-12-28T03:51:40Z")

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Hi @hongweiyin!

> [@hongweiyin](#):
>
> I am a new Qiime 2 user

Welcome!

> [@hongweiyin](#):
>
> I am attempting to import joined fastq files (this means that I have only one fastq per sample that includes R1+R2 joined)

Have you had a chance to review the "[Analyzing paired end reads in QIIME 2" Community Tutorial](https://forum.qiime2.org/t/analyzing-paired-end-reads-in-qiime-2/2021)? In particular, the section titled "Importing pre-joined reads" will get you started with importing your reads - then you can go back to the beginning of the tutorial and work your way through (skipping the "Joining reads" section, since you will have imported pre-joined reads at that point).

> [@hongweiyin](#):
>
> i can use dada in the next analysis

DADA2 works best with unjoined reads - DADA2's error model considers the forward and reverse reads separately, and joins the reads for you as part of the quality control step. If you want to work with ASVs, I would recommend working with `q2-deblur` (there are details on how to do that in the tutorial I linked to above).

Let us know if you get stuck or have any questions, thanks! 🦖

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**Author:** ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)\
**Post date:** [January 3, 2018, 3:36pm UTC](https://forum.qiime2.org/t/qiime2-import-fastq/2320/5 "2018-01-03T15:36:05Z")

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An off-topic reply has been split into a new topic: [SILVA vs Greengenes](https://forum.qiime2.org/t/silva-vs-greengenes/2404)

Please keep replies on-topic in the future.

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**Author:** ![system](https://forum-qiime2-org.s3.dualstack.us-west-2.amazonaws.com/original/3X/2/1/21af5fe23cb6f4579467c66a9ed94e55274ca7bd.svg) [@system](https://forum.qiime2.org/u/system)\
**Post date:** [February 3, 2018, 9:36pm UTC](https://forum.qiime2.org/t/qiime2-import-fastq/2320/6 "2018-02-03T21:36:05Z")

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