The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL FVGWAS: Fast Voxelwise Genome Wide Association Analysis of Large-scale Imaging Genetic Data Tutorial: pipeline,

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The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL FVGWAS: Fast Voxelwise Genome Wide Association Analysis of Large-scale Imaging Genetic Data Tutorial: pipeline, software and example

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL (I) Spatially Heteroscedastic Linear Model (II) Global Sure Independence Screening Procedure (III) Detection Procedure FVGWAS: Pipeline

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL A Software for FVGWAS

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL A Software for FVGWAS

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Description of input files Covariates: n*d design matrix. n is the sample size and d is the number of covariates Data: image data (n*V matrix). V is the number of voxels (whole brain analysis) or the number of ROIs (volumetric analysis) SNP: genetic data (n*C matrix). C is the number of SNPs Image index: V*1 vector. The index of voxels within the brain mask (Applicable only for whole brain analysis) Image size: the size of image data, e.g., 1*3 vector means 3-D image data (Applicable only for whole brain analysis) N0: the number of top SNPs G: the number of bootstrap samples

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Example: ADNI Data Volumetric Analysis 708 MRI scans of AD (186), MCI (388), and healthy controls (224) from ADNI-1. These scans on 462 males and 336 females are performed on a 1.5 T MRI scanners. The volumes of 93 ROIs for all subjects are computed. Covariates include intercept, gender, age, whole brain volume, and the top 5 principal component scores 501,584 SNPs are remained after quality control

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Lunch FVGWAS in MatLab

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Load Data into FVGWAS  Click the button Covariates: load “volumetric_covariate.mat”  Click the button Data: load “volumetric_image_roidata.mat”  Click the button SNP: load “volumetric_snpdata.txt”  Set N0: 1000  Set G: 1000  Click the button Output directory: set “E:/FVGWAS-1.0/Oput”  Click the button RUN

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Output files of FVGWAS  “GSISresults.mat” results of GSIS step, variable “pp” contains the -log_10{p-values} of all SNP data.  “voxelclusterandSNP.mat” variable “rawpvalue” is a C*N_0 matrix including the raw p-values of top N0 SNPs. variable “pv” is a C*N_0 matrix, including the corrected p-values.

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL Results summary of FVGWAS  Run “manhattanplot.m” in MatLab to generate the GWAS results Output file: “SNP_ROIandSNP_nonsmoothing_hg19_ALL708_SC.txt”  Run “manp.R” in R to plot the Manhattan plot and QQ plot

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL ADNI Data Analysis : Volumetric Analysis

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL ADNI Data Analysis : Volumetric Analysis Numbers of significant SNP–ROI pairs based on the corrected p-values

The UNIVERSITY of NORTH CAROLINA at CHAPEL HILL ADNI Data Analysis : Volumetric Analysis Top SNPs associated with volumes of HL/HR —Hippocampus Left/Right and AL/AR — Amygdala Left/Right