Fig. 1. (a) Coupling-phase RAPD marker OBC06.300, (b) SCAR marker SOBC06.308 amplified with the specific primer pair designed from the sequence of the RAPD marker OBC06.300, and (c) repulsion-phase RAPD marker OAY15.200 expressing polymorphism between two DNA bulks from susceptible and resistant F₂ plants, and between the susceptible parent GN Nebr.#1 sel.27 and the resistant parent Olathe. 1 = molecular size marker, 2 = GN Nebr.#1 sel.27, 3 = Olathe, 4 = DNA bulk from susceptible F₂ plants, and 5 = DNA bulk from resistant F₂ plants.