|Grafton, Ken - NORTH DAKOTA STATE UNIV|
|Hauf, Darrin - PIONEER HI-BRED|
|Kelly, James - MICHIGAN STATE UNIV|
Submitted to: Germplasm Release
Publication Type: Germplasm Release
Publication Acceptance Date: March 12, 2005
Publication Date: May 1, 2005
Citation: Miklas, P.N., Grafton, K., Hauf, D., Kelly, J. 2005. Release of partial white mold resistant pinto bean germplasm lines uspt-wm-1 and uspt-wm-2. Germplasm Release. Annual Report Bean Improv. Coop. 48:190-191. Technical Abstract: The Agricultural Research Service, U.S. Department of Agriculture, the North Dakota State Agricultural Experiment Station, and the Agricultural Experiment Station of Michigan State University announce the release of USPT-WM-1 and USPT-WM-2 pinto bean (Phaseolus vulgaris L.) germplasm lines with partial resistance to white mold caused by the fungal pathogen Sclerotinia sclerotiorum Lib. deBary. Scientists participating in the development of this germplasm were Phil Miklas (USDA-ARS, Prosser, WA), Ken Grafton (North Dakota State University), Darrin Hauf (North Dakota State University), and James Kelly (Michigan State University). White mold is rated the number one economic disease problem of dry bean production in the U.S., and is a major problem in pinto beans, which are highly susceptible to the disease. The disease is endemic in all production regions of the U.S., and is most problematic under moist conditions resulting from rains or excess irrigation during flowering and mid-pod fill stages from late July through August. The resistance in USPT-WM-1 and USPT-WM-2 is conferred in part by two QTL that derive from ICA Bunsi navy bean (synonymous with Ex Rico 23 in Canada).