Question: HiSat2- over 50% of reads failed to align
0
gravatar for Lindsay44
2.0 years ago by
Lindsay440
Lindsay440 wrote:

Hello,

I am using Hisat2 to align reads to a reference genome (mm10).

However, over 50% of reads failed to align to the genome.

What went wrong? Is it the reference genome I am using? Is it the quality of the data?

Thanks.

rna-seq alignment • 1.6k views
ADD COMMENTlink modified 2.0 years ago by Jennifer Hillman Jackson25k • written 2.0 years ago by Lindsay440
0
gravatar for Jennifer Hillman Jackson
2.0 years ago by
United States
Jennifer Hillman Jackson25k wrote:

Hello,

It could be due to any of these reasons: the setting used with the tool, the fastq sequence quality score scaling, the format of a custom reference genome (if used), the quality of the custom reference genome assembly (again, if used), the quality of the sequence reads (run FastQC after confirming quality score scaling to check and QA as needed).

Help links:

Best, Jen, Galaxy team

ADD COMMENTlink written 2.0 years ago by Jennifer Hillman Jackson25k
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