viral biodiversity in rodents

15
nacho caballero pasteur cayenne Does human perturbation affect the viral biodiversity of rodents?

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I was invited to give a short presentation about the tools that I use for my research in Cayenne, French Guiana (sickle, velvet, digital normalization (khmer), krona, awk and others).

TRANSCRIPT

Page 1: Viral biodiversity in rodents

nacho caballero pasteur cayenne

Does human perturbation affect the viral biodiversity of rodents?

Page 2: Viral biodiversity in rodents

Collect biological samples

Page 3: Viral biodiversity in rodents
Page 4: Viral biodiversity in rodents

Isolate the viruses

Page 5: Viral biodiversity in rodents

Sequence viral cDNA

Page 6: Viral biodiversity in rodents

FastQC

Analyze read quality

Page 7: Viral biodiversity in rodents

sickle - github.com/najoshi/sickle

Trim low-quality base pairs

Page 8: Viral biodiversity in rodents

k

Split reads into k-mers

Page 9: Viral biodiversity in rodents

Remove redundant reads

0coverage

10

number of nucleotides

with that coverage

100

Page 10: Viral biodiversity in rodents

Remove redundant reads

coverage0 10 100

digital normalization (khmer)number of

nucleotides with that coverage

Page 11: Viral biodiversity in rodents

Assemble reads into contigs

velvet - www.ebi.ac.uk/~zerbino/velvet/

Page 12: Viral biodiversity in rodents

Align contigs to known sequences

blastn - blastx - tblastx

NCBI

viprbrc.orgbit.ly/vipr_download

Page 13: Viral biodiversity in rodents

Classify alignments by taxonomy

krona

Page 14: Viral biodiversity in rodents

Small tools that do one thing well

awk sed join sort grep cut

Powerful file manager

zsh (globbing, renaming)

Statistics and data reshaping

R

Page 15: Viral biodiversity in rodents

Does human perturbation affect the viral biodiversity of rodents?

[email protected]