To whom it may concern

I would like to kindly ask you if you do have any experience in de-novo transcriptomic analysis (no reference genome available) who might give us some advice. Our main question is how to create the best set of cDNA contigs, on which we can map our RNAseq reads for the analysis of differential expression. Currently 4 larger sets of of RNAseq reads are available from different genotypes as well as draft genome assembly for one of the genotypes. We worry about the SNPs in different genotypes affecting the assembly, if we combine all the RNAseq datasets and using assemblers such as Trinity, Oases, Velvet. Might it be better to use the draft genomic assembly to obtain cDNA contigs using Tophat/cufflinks via all available RNAseq data or only using the RNAseq data from the same genotype as the genome draft?

Thank you in advance
Best wishes
Miro Sotak
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