Yaamini asked me to run the epidiverse/snp pipeline (GitHub Issue) on her Haws Crassostrea gigas (Pacific oyster) Hawaii bisuflite sequencing BAMs for SNP identification.

I ran a version of this yesterday (20221214), using a modified config file to see if there would be a noticeable difference in runtimes. For this run, I just utilized the default, base config file with no modifications.

This was run using BAMs found here:

https://gannet.fish.washington.edu/spartina/project-oyster-oa/Haws/bismark-2/r3644*.deduplicated.sorted.bam

Genome FastA was a version of the cgigas_uk_roslin_v1 genome in which Yaamini appended the mitochondrial sequences:

cgigas_uk_roslin_v1_genomic-mito.fa (FastA; 626MB)

As part of this, I decided to mess around with the EpiDivers/snp base config file to try to speed things up a bit.

As mentioned, the job was run on Mox.

SBATCH script (GitHub):

20221215-cgig-nextflow-epdiverse-snp-haws-hawaii-base_config.sh

#!/bin/bash
## Job Name
#SBATCH --job-name=20221215-cgig-nextflow-epdiverse-snp-haws-hawaii-base_config
## Allocation Definition
#SBATCH --account=srlab
#SBATCH --partition=srlab
## Resources
## Nodes
#SBATCH --nodes=1
## Walltime (days-hours:minutes:seconds format)
#SBATCH --time=12-00:00:00
## Memory per node
#SBATCH --mem=120G
##turn on e-mail notification
#SBATCH --mail-type=ALL
#SBATCH --mail-user=samwhite@uw.edu
## Specify the working directory for this job
#SBATCH --chdir=/gscratch/scrubbed/samwhite/outputs/20221215-cgig-nextflow-epdiverse-snp-haws-hawaii-base_config

# Run EpiDiverse/snp on C.gigas Bismark BAMs generated by Yaamini for Haws Hawaii project.
# Requires a FastA file with extension: .fa
# Requires a FastA index file to be in same directory as FastA.

#### Duplicate of 20221214 run, but this run uses base config to compare run times.

###################################################################################
# These variables need to be set by user

## Directory with BAM(s)
bams_dir="/gscratch/scrubbed/samwhite/data/C_gigas/BSseq"

## Location of EpiDiverse/snp pipeline directory
epi_snp="/gscratch/srlab/programs/epidiverse-pipelines/snp"

## FastA file is required to end with .fa
## Requires FastA index file to be present in same directory as FastA
genome_fasta="/gscratch/srlab/sam/data/C_gigas/genomes/cgigas_uk_roslin_v1_genomic-mito.fa"

## Location of Nextflow
nextflow="/gscratch/srlab/programs/nextflow-21.10.6-all"

## Specify desired/needed version of Nextflow
nextflow_version="20.07.1"


###################################################################################


# Exit script if a command fails
set -e

# Load Anaconda
# Uknown why this is needed, but Anaconda will not run if this line is not included.
. "/gscratch/srlab/programs/anaconda3/etc/profile.d/conda.sh"

# Activate NF-core conda environment
conda activate epidiverse-snp_env


## Run EpiDiverse/snp
NXF_VER=${nextflow_version} \
${nextflow} run \
${epi_snp} \
--input ${bams_dir} \
--reference ${genome_fasta} \
--variants \
--clusters

###################################################################################
# Capture program options
if [[ "${#programs_array[@]}" -gt 0 ]]; then
  echo "Logging program options..."
  for program in "${!programs_array[@]}"
  do
    {
    echo "Program options for ${program}: "
    echo ""
    # Handle samtools help menus
    if [[ "${program}" == "samtools_index" ]] \
    || [[ "${program}" == "samtools_sort" ]] \
    || [[ "${program}" == "samtools_view" ]]
    then
      ${programs_array[$program]}

    # Handle DIAMOND BLAST menu
    elif [[ "${program}" == "diamond" ]]; then
      ${programs_array[$program]} help

    # Handle NCBI BLASTx menu
    elif [[ "${program}" == "blastx" ]]; then
      ${programs_array[$program]} -help
    fi
    ${programs_array[$program]} -h
    echo ""
    echo ""
    echo "----------------------------------------------"
    echo ""
    echo ""
  } &>> program_options.log || true

    # If MultiQC is in programs_array, copy the config file to this directory.
    if [[ "${program}" == "multiqc" ]]; then
      cp --preserve ~/.multiqc_config.yaml multiqc_config.yaml
    fi
  done
  echo "Finished logging programs options."
  echo ""
fi


# Document programs in PATH (primarily for program version ID)
echo "Logging system \$PATH..."
{
date
echo ""
echo "System PATH for $SLURM_JOB_ID"
echo ""
printf "%0.s-" {1..10}
echo "${PATH}" | tr : \\n
} >> system_path.log
echo "Finished logging system $PATH."

RESULTS

Runtime (~12hrs) was remarkably faster than yerstday’s runtime using the modified config file. In fact, using the defaul config file, the runtime was >50% faster! Good to know!

Output folder:

20221215-cgig-nextflow-epdiverse-snp-haws-hawaii-base_config/
- Variant Call Format (VCF) files and index files:
  - 20221215-cgig-nextflow-epdiverse-snp-haws-hawaii-base_config/snps/vcf/

RESULTS

Variant Call Format (VCF) files and index files: