Comments (3)
Hello, @8banzhuan
First of all thanks for using CoLoRd! It is hard to tell what causes this. We may have some suspicions. One of them is maybe the data you are compressing is of such excellent quality that the reference genome is in fact not beneficial at all. It would be great if you could provide your input fasta file. Also, I'm not sure what you mean by "comparison ratio". In fact, it would be great if you could also provide your whole testing pipeline (command lines).
from colord.
Hello, @8banzhuan First of all thanks for using CoLoRd! It is hard to tell what causes this. We may have some suspicions. One of them is maybe the data you are compressing is of such excellent quality that the reference genome is in fact not beneficial at all. It would be great if you could provide your input fasta file. Also, I'm not sure what you mean by "comparison ratio". In fact, it would be great if you could also provide your whole testing pipeline (command lines).
thank you for your reply!Comparison rate it means the ratio of my FASTA data successfully mapped to the reference genome,I used Li Heng's minimap2 for mapping, and then used samtools to analyze the alignment rate in the sam file. I wanted to find out the impact of the alignment rate on the compression rate (in the case of a reference genome)
The command I use is similar to the following
colord compress-hifi -G reference.fasta inputfile.fasta outputfie
The situation I encountered is that the size of the reference genome does not seem to improve my compression rate very much.
In other words, I use a reference genome with an alignment rate of about 25% and a reference genome with an alignment rate of 9%, and the compression rate is almost the same (both are 10% of the original file),For the reference genome with poor alignment quality, is the compression rate of colord using the reference genome mode much better than the effect without the reference genome?
Looking forward to your reply, best wishes!
from colord.
Hi,
sorry for the late response, I didn't get (or missed) a notification.
And what is the compression ratio when the reference genome is not used at all?
Since you are using hifi data maybe its quality is so good that there are no benefits from using the reference genome.
from colord.
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