Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Germplasm Release
Publication Acceptance Date: June 1, 2005
Publication Date: April 4, 2006
Citation: Miklas, P.N., Smith, J.R., Singh, S.P. 2006. Release of common bacterial blight resistant pinto bean germplasm lines USPT-CBB-5 and USPT-CBB-6. Bean Improvement Cooperative Annual Report. 49:283-284. Technical Abstract: The Agricultural Research Service, U.S. Department of Agriculture, and the Idaho Agricultural Experiment Station announce the release of USPT-CBB-5 and USPT-CBB-6 pinto bean (Phaseolus vulgaris L.) germplasm lines with high levels of resistance to common bacterial blight caused by Xanthomonas axonopodis pv. phaseoli (Xap). Scientists participating in the development of this germplasm were Phil Miklas (USDA-ARS, Prosser, WA), James Smith (USDA-ARS, Stoneville, MS), and Shree Singh (University of Idaho). Common bacterial blight is a major seed-borne disease of common bean worldwide. The disease is endemic to pinto bean production regions in Colorado, Michigan, Minnesota, Montana, Nebraska, North Dakota, and Wyoming. Genetic resistance in the host provides the most effective control of this disease, and planting certified disease-free seed is critical. USPT-CBB-5 and USPT-CBB-6 possess two major QTL and perhaps other minor genes that confer a high level of resistance to Xap. Marker-assisted selection for the SAP6 and SU91 markers tightly linked with QTL derived from great northern landrace cultivar Montana No.5 and breeding line XAN 159, respectively, was used in development of USPT-CBB-5 and USPT-CBB-6 for combating this problematic disease of pinto bean in the U.S.