Gene structure of the target genes screened in the inodorus population (ACO-1, NOR, DET-1 and DHS). Boxes represent exons and lines introns. White and black boxes indicate 3'UTR and 5'UTR regions. Amplicons analyzed by TILLING are indicated. Black triangles indicate mutations found in the Piel de Sapo population. Numbers correspond to the mutations described in table 3.