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Title: Registration of Common Bacterial Blight Resistant Dark Red Kidney Bean Germplasm Line USDK-CBB-15

item Miklas, Phillip - Phil
item Smith, James - Rusty

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/3/2005
Publication Date: 3/1/2006
Citation: Miklas, P.N., Smith, J.R., Singh, S.P. 2006. Registration of common bacterial blight resistant dark red kidney bean germplasm line USDK-CBB-15. Crop Science. 46:1005-1006.

Interpretive Summary: USDA-ARS (Prosser, WA and Mayaguez, PR) and University of Idaho (Kimberly) developed a new kidney bean germplasm line, USDK-CBB-15, with a high level of genetic resistance to common bacterial blight. Common bacterial blight is a serious disease that plagues commercial bean production across the U.S. The disease adversely affects seed production in California, Idaho, Washington, Wyoming, and other western states where there is a zero tolerance policy enforced for common bacterial blight and infected fields are ploughed down. DNA markers tightly linked with resistance genes from other sources were used to develop this germplasm line via marker-assisted selection. USDK-CBB-15 will be most useful for improving kidney bean production in Colorado, Michigan, Minnesota, Nebraska, New York, North Dakota, and Wisconsin. Note: about 90% of the kidney bean acreage across the U.S. (60,000 acres with ~ $60 million farm gate value) is vulnerable to this disease.

Technical Abstract: Dark red kidney bean (Phaseolus vulgaris L.) germplasm line USDK-CBB-15 was developed by USDA-ARS in cooperation with the Idaho Agricultural Experiment Station and released in 2005. This line was bred specifically for a high level of resistance to common bacterial blight (Xanthomonas axonopodis pv. phaseoli) which is a major seed-transmitted disease that limits kidney bean production in the U.S. USDK-CBB-15 possesses two major quantitative trait loci (QTL) and perhaps other minor genes that confer a high level of resistance to Xap. Marker-assisted selection using the SAP6 and SU91 sequence-characterized amplified region (SCAR) markers tightly linked with QTL derived from great northern landrace cultivar Montana No.5 and breeding line XAN 159, respectively, enabled us to expedite development of USDK-CBB-15 to combat this entrenched disease problem in the U.S. USDK-CBB-15 (previously tested as PS99-009F-5-15-1) derives from a “modified” backcrossing scheme (dark red kidney*4/XAN 159); modified, because a different dark red kidney parent was used for each backcross, and the initial cross underwent two generations of pedigree selection. Thus, USDK-CBB-15 is a modified BC3F1:4 bulk from the cross K97305/3/ SVM-2242//I9566-21-4-2/‘Montcalm’. USDK-CBB-15 will be most useful for incorporating resistance to common bacterial blight in the dark red kidney market class, but also other large-seeded Andean dry and garden bean.