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Title: IDENTIFICATION OF PARTIAL RESISTANCE TO SCLEROTINIA SCLEROTIORUM IN COMMON BEAN AT MULTIPLE LOCATIONS

Author
item STEADMAN, J - UNIV OF NEBRASKA
item OTTO-HANSON, L - UNIV OF NEBRASKA
item POWERS, K - UNIV OF NEBRASKA
item KUROWSKI, C - CALIFORNIA
item MAINZ, R - MINNESOTA
item KELLY, J - MICHIGAN
item GRIFFITHS, P - NEW YORK
item GRAFTON, K - NORTH DAKOTA
item MYERS, J - OREGON
item Miklas, Phillip - Phil
item SCHWARTZ, H - COLORADO

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: 2/1/2004
Publication Date: 4/1/2004
Citation: Steadman, J.R., Otto-Hanson, L.K., Powers, K., Kurowski, C., Mainz, R., Kelly, J., Griffiths, P., Grafton, K., Myers, J., Miklas, P.N., Schwartz, H. 2004. Identification of partial resistance to sclerotinia sclerotiorum in common bean at multiple locations. Bean Improvement Cooperative Annual Report. 47:281-282.

Interpretive Summary:

Technical Abstract: No complete resistance to Sclerotinia sclerotiorum, cause of white mold, has been found in common bean. The development of bean cultivars with partial physiological resistance and architectural avoidance to white mold would reduce disease losses and require no input costs of producers. The objective of the study was to identify bean germplasm with broad partial resistance to white mold. To accomplish this, putative sources of resistance developed by bean breeders were evaluated by greenhouse and field screening methods in different US locations. Twelve separate screening tests, six field and six greenhouse were rated on a scale ranging from most resistant (1) to most susceptible (12). Dwarf Bees, Cornell 601, G122, Cornell 501, and AN 37 were the most resistant. When greenhouse and field tests were analyzed separately, N02 302, G122, Cornell 50l, and AN 37 were ranked lowest in field tests, but Cornell 601 and Dwarf Bees replaced N02 302 in the lowest rankings from greenhouse tests, where N02 302 ranked the highest (=most susceptible). N02 302 probably has field avoidance to white mold.