Fig. 4From: Discovery of a novel mitochondrial DNA molecule associated with tetrad pollen sterility in potatoSchematic representation of the P-4 region in contig 6 of 17H117-9, amplified using the primer pair rps1_EO/cox2_partial_SO (1715Â bp). The dashed frames indicate symmetrically duplicated regions (46.6Â kb)Back to article page