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Velvet and ABySS (de Bruijn graph Assemblers)

Why Velvet and ABySS, the de Bruijn graph assemblers produce greater number of contigs than any other assembler? Ideally, a good assembler should generate less number of contigs.

de novo ngs assembly

1 answer

Some assemblers are more 'conservative' than others when it comes to merging small contigs into larger contigs, so will give an assembly with a larger number of contigs.

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