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Heritability estimation with PsychENCODE data using GCTA

Here are scripts for running GCTA on the European frontal lobe samples from PsychENCODE. Tools and programs used inlude PLINK, GCTA and R.

Folder structure

GCTA
|
+--data
|  |
|  \--PROJECT_NAME
|     |
|     +--output
|     |  |
|     |  +--fin_peds
|     |  |
|     |  +--graphs
|     |  |
|     |  +--grm_chrs
|     |  |
|     |  +--grm_ranges
|     |  |
|     |  +--grms
|     |  |
|     |  +--hsqs
|     |  |
|     |  +--mgrms
|     |  |
|     |  \--results
|     |
|     \--input
|        |
|        +--BED files
|        |
|        +--PED files
|        |
|        +--VCF files
|        |
|        +--Rdata files
|        |
|        +--Phenotype files for GREML
|        |
|        \--Removed related individuals
|
+--fin_genotype
|
+--fin_phenotype
|
+--scripts
|  |
|  +--plan.rmd
|  |
|  +--build_project.sh
|  |
|  +--run_bivariate_gcta.sh
|  |
|  \--run_gcta.sh for running GREML
|
\--README.md

Usage

First time setting up, we'll need to generate necessary input files and set up the directory structure. The provided script scripts/build_project.sh will take in VCF and BED files and set up the initial directory hierarchy and necessary files for the GCTA analysis.

# Running analysis on European population, SNPs subsetted to those in HRC panel, gene 
# expression with sequencing PCs regressed out, calculating heritability from the SNPs 
# in a 1Mbase cis window:
# The following script will build a directory structure with the provided names, as 
# well as process and link the resulting files from the provided VCF and BED file.

./scripts/build_project.sh -f EUR gene_SPC HRC 1Mbase_cis genotype.vcf phenotype.bed

Afterwards, the provided script scripts/run_gcta.sh will run GCTA on the data.

# The -a flag allows us to choose the type of analysis
# The -t flag allows us to input a range of phenotypes we want to run GCTA with. 
# If we want to run against all provided phenotypes, we use 1-total number of phenotypes.
# The -w flag sets the cis window size.
# The -n flag points to the directory name that the previous script set up

./scripts/run_gcta.sh \
    -a cis \
    -n EUR_HRC_gene_SPC_1Mbase_cis \
    -t 1-$(cat fin_RNA_seq/EUR_gene_SPC/phenotype_ids | wc -l) \
    -w 1000000

Finally, we compile the HSQ output from GCTA into a single file, using scripts/compile_results.sh.

./scripts/compile_results.sh \
    -a cis \
    -n EUR_HRC_gene_SPC_1Mbase_cis

The results can be found at data/EUR_HRC_gene_SPC_1Mbase_cis/output/results/all_variance.txt