After conducting a GWAS I have a set of SNPs and a set of genes that were significantly associated to my trait.
I want to know if the genes that I have found are significantly expressed on the tissues present in the GTEX database. I have never worked with expression data before, and I don't even know if talking about significance makes sense here.
For instance, say I want to know if BRCA2 is expressed in any of the tissues in the GTEX database. After querying the gene, what threshold value, based on this plot should I use?
Link for the search: https://www.gtexportal.org/home/gene/BRCA2