|Miklas, Phillip - Phil|
Submitted to: Journal of the American Society for Horticultural Science
Publication Type: Peer reviewed journal
Publication Acceptance Date: 7/1/1998
Publication Date: N/A
Citation: ARIYARATHNE, H.M., COYNE, D.P., JUNG, G., SKROCH, P.W., VIDAVER, A.K., STEADMAN, J.R., MIKLAS, P.N., BASSETT, M.J. MOLECULAR MAPPING OF DISEASE RESISTANCE GENES FOR HALO BLIGHT, COMMON BACTERIAL BLIGHT, AND BEAN COMMON MOSAIC VIRUS IN A SEGREGATING POPULATION OF COMMON BEAN. JOURNAL OF AMERICAN SOCIETY OF HORTICULTURAL SCIENCES, 124:654-662. 1999. Interpretive Summary: Cultivars with multiple disease resistance are a priority for many bean breeding programs because they exhibit improved yield, quality, and require fewer pesticide applications during production. Genetic linkage maps of disease resistance traits facilitate breeding for multiple disease resistan by indicating which disease resistance traits are linked together. We developed a linkage map for resistance to halo blight, common blight, and mosaic virus, because all three diseases occur together in temperate production regions of the world. Linkage associations among resistance trai learned from this study will facilitate development of multiple disease resistant dry bean cultivars. Increased quality, yield, and reduced pestici use will ultimately result from this study.
Technical Abstract: Diseases of beans (Phaseolus vulgaris L.) are primary constraints affecting bean production. Information on tagging and mapping of genes for disease resistance is expected to be useful to breeders. The objectives of this study were to develop a random amplified polymorphic DNA (RAPD) marker linkage map using 78 F9 recombinant inbred (RI) lines derived from a Middle-American common bean cross Great Northern Belneb RR-1 [resistant to common bacterial blight (CBB) and halo blight (HB)] x black A 55 [dom- inant I gene resistance to bean common mosaic potyvirus] and to map genes or QTL for resistance to CBB, HB, BCMV (bean common mosaic potyvirus), and BCMNV (bean common mosaic necrosis virus) diseases. Four regions on link- age groups 2, 4, 5, and 9, were significantly associated with leaf react- ions to HB strain 83-Sc2A. The I locus for resistance to BCMV and BCMNV was mapped to LG2. Five and four markers were significantly associated with QTL for resistance to CBB in leaves and pods, respectively, with four of them associated with resistance in both plant organs.