Table 1.

2 × 2 contingency table for gene set enrichment test with QTL.

	Overlapped with QTL regions	Not overlapped with QTL regions	Total
Selected gene set	N Gk Q	N Gk Q c	N Gk
Not selected gene set	N Gk c Q	N Gk c Q c	N Gk c
Total	N Q	N Q c	N

Ω: gene space; N_Gk: number of genes in _Gk; N_Gk^c: number of genes in _Gk^c; N_Q: number of QTL hit genes in gene space: N_Q^c: number of non-QTL hit genes in gene space. _Gk: k-th gene sample from selected gene set; _Gk^c: Ω-_Gk.