Fig. 1: QTL identified for ADH (alcohol dehydrogenase) activity in larval Drosophila melanogaster developing in substrate with 0, 7, and 14% alcohol (top, middle, and bottom panel, respectively).

Black line represents the 95% LOD score thresholds using 1000 permutation tests. The identified QTL contains the Adh gene and its regulatory locus, delta-1.