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United States Department of Agriculture

Agricultural Research Service

Research Project: Develop Stress-Resistant Dry Bean Germplasm and Sustainable Pest Management Strategies for Edible Legumes

Location: Vegetable and Forage Crops Production Research

Title: Registration of partial white mold resistant pinto bean germplasm line USPT-WM-12

Authors
item Miklas, Phillip
item Kelly, James -
item Steadman, James -
item Mccoy, Serena -

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: February 27, 2014
Publication Date: N/A

Interpretive Summary: Pinto bean is the most important edible dry bean market class grown in the United States. The number one disease problem identified by growers limiting pinto bean production in the U.S. is white mold. This disease is caused by a fungal pathogen that is ubiquitous in most pinto bean production regions. Integrated management consisting of chemical fungicides, cultural practices, and partially resistant pinto beans is the prescribed strategy for controlling white mold disease. USDA-ARS Research Geneticist in collaboration with a Breeder from Michigan State University and Plant Pathologists from University of Nebraska developed a pinto bean germplasm line USPT-WM-12 which possesses high levels of partial field resistance to white mold disease. This line is intended to provide useful germplasm for improving white mold resistance in pinto bean cultivar development. Cultivars with improved resistance will contributed to better integrated control of white mold disease in pinto bean production field across the U.S. Seed of this line has been requested by Breeder across the U.S. and Canada, and even from a few international programs.

Technical Abstract: Pinto bean (Phaseolus vulgaris L.), the most widely grown dry bean market class across the United States, is highly susceptible to white mold disease caused by the fungal pathogen Sclerotinia sclerotiorum Lib deBary. The Agricultural Research Service, Michigan State University AgBioResearch, and the University of Nebraska Agricultural Experiment Station, announce the release of USPT-WM-12 pinto bean germplasm line with partial resistance to white mold. USPT-WM-12 was developed by modified pedigree breeding method from the cross G99750/USPT-WM-1, and was tested as PS02-037-2 or 37-2 in early generations. In later generations, USPT-WM-12 exhibited consistently high levels of partial resistance to white mold in field and straw tests conducted by the national Bean White Mold Nursery (BWMN) from 2008 to 2012. USPT-WM-12 also exhibited high yield potential under white mold disease pressure in Michigan, ranking the highest for yield of 64 lines tested for two consecutive years in 2010 and 2011. USPT-WM-12 has commercially acceptable agronomic characteristics including upright architecture and moderate maturity, but seed appearance is too dark for commercial acceptance. USPT-WM-12 is intended for use by breeders to improve partial resistance to white mold in pinto and related great northern, small red, and pink dry bean market classes representative of Race Durango.

Last Modified: 7/22/2014
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