gpertea / stringtie

Transcript assembly and quantification for RNA-Seq
MIT License
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The output gtf file contains exon with coverage=0 #432

Open dudududu12138 opened 5 months ago

dudududu12138 commented 5 months ago

Hi, I recently ran stringtie2 to assemble transcript from long RNA-seq data. My data is a HIFI cDNA data. And I map raw data to GRCh38 with minimap2. Then I ran stringtie2 with the following code:

stringtie -L -G ref.anno.gtf -o result.gtf alignment.bam

While I noticed that the output result of the gtf file is odd. The min coverage of every transcript is 1 ,while the min coverage of some exons are 0.

My question is : How are exons with 0 coverage detected?

Example1 : the transcript has 2 exons , one of them has a 0 coverage 1718960548054

Example2:this is many transcripts with coverage=1, while these are all single-exon transcripts, are them true transcripts? 1718960926765

Thanks!