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Different k-mer combination generate different results #1127

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@Niohuruzh

Description of bug

Hello,
I try to find a gene whether is complete in my genome assembled by SPADES based on Illumina data. First I try spades.py -k 21,33,55,77,99 --isolate -t 46 --cov-cutoff auto -1 ${a}_1.rd.fastq -2 ${a}_2.rd.fastq -o output to generate a genome. Then I use blastn, and I get a complete gene sequence. Second, I try spades.py -k 17,33,43,55,77,99,111 --isolate -t 46 --cov-cutoff auto -1 ${a}_1.rd.fastq -2 ${a}_2.rd.fastq -o output to generate a genome. Then I use blastn, and I get a fragmental gene sequences in different 'NODE'. So is there any suggestion to choose the best k-mer combination when assemble a genome.

Looking forward your reply!
Best wishes

spades.log

if need

params.txt

if need

SPAdes version

v3.15.4

Operating System

MINT20

Python Version

Python 3.7.12

Method of SPAdes installation

conda

No errors reported in spades.log

  • Yes

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