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RAPD and SCAR Markers Linked to the Ur-6 Andean Gene Controlling Specific Rust Resistance in Common Bean

^a Dep. of Agronomy & Horticulture, Univ. of Nebraska, Lincoln, NE 68583
^b Dep. of Plant Pathology, Univ. of Nebraska, Lincoln, NE 68583
^c Dep. of Horticulture, Texas A&M Univ., Weslaco, TX 78596
^d Dep. of Soil & Crop Sciences, Colorado State Univ., Fort Collins, CO 80523

View larger version (44K): [in a new window]   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.

View larger version (21K): [in a new window]   Fig. 2. Linkage group 11 including Ur-6 controlling specific rust resistance and seven coupling-phase RAPD and SCAR markers developed using an F2 population of the common bean cross Olathe x Nebr.#1 sel.27 (CON), Ur-6 and five repulsion-phase RAPD markers developed using the F2 population (RON), and RAPD markers developed using a recombinant inbred line population of the cross BelNeb-RR-1 x A 55 (BA). The gene and marker names are given on the right and the length in centimorgans is indicated on the left of linkage group 11. Markers OAB18.650 and G5.500 in linkage group 11 are connected between the F2 and recombinant inbred line populations by lines.