# How consider both paired ends ddRAD reads in de novo map analysis

**URL:** <https://help.galaxyproject.org/t/how-consider-both-paired-ends-ddrad-reads-in-de-novo-map-analysis/1124>\
**Category:** usegalaxy.eu support\
**Tags:** devops-administration, workflow\
**Created:** [April 22, 2019, 1:12pm UTC](https://help.galaxyproject.org/t/how-consider-both-paired-ends-ddrad-reads-in-de-novo-map-analysis/1124 "2019-04-22T13:12:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tommynoose](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@tommynoose](https://help.galaxyproject.org/u/tommynoose)\
**Post date:** [April 22, 2019, 1:12pm UTC](https://help.galaxyproject.org/t/how-consider-both-paired-ends-ddrad-reads-in-de-novo-map-analysis/1124/1 "2019-04-22T13:12:31Z")

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Hi users,  
I start from two demultiplexed fastaq files for each sample (sample.R1 and sample.R2) and I need perform de novo map analysis. I read in stacks manual that ddrad reads can be assembled as independent loci.  
How can I do this on Galaxy?

Thanks