ARS | Publication request: REGISTRATION OF TWO CRANBERRY BEAN GERMPLASM LINES RESISTANT TO BEAN COMMON MOSAIC AND MECROSIS POTYVIRUSES: USCR-7 AND USCR-9

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: December 1, 2001
Publication Date: June 1, 2002
Citation: MIKLAS, P.N., KELLY, J.D. REGISTRATION OF TWO CRANBERRY BEAN GERMPLASM LINES RESISTANT TO BEAN COMMON MOSAIC AND MECROSIS POTYVIRUSES: USCR-7 AND USCR-9. CROP SCIENCE, 42:673-674. 2002.

Interpretive Summary: The USDA-ARS Dry Edible Bean Germplasm Enhancement Project at Prosser, WA, released two cranberry bean germplasm lines: USCR-7 and USCR-9, with complete genetic resistance to bean common mosaic virus and bean common mosaic necrosis virus. These seed borne viruses plague bean production worldwide, and are an extreme nuisance for seed producers in the Pacific Northwest. A single plant infected by one of these viruses in a seed production field is enough to reject the entire seed lot. These two lines are immune to the virus and thus ensure virus free seed production and protection from devastating yield loss. These two lines will be most useful to plant breeders and seedsmen interested in incorporating extreme resistance to potyvirus in the cranberry bean market class. Breeders from around the world have already requested seed of these beans.

Technical Abstract: Two dry edible cranberry bean (Phaseolus vulgaris L.) germplasm lines with resistance to bean common mosaic virus (BCMV) and bean common mosaic necrosis virus (BCMNV) were developed by USDA ARS, Prosser, WA. BCMV and BCMNV are seed-borne viruses that adversely effect production and distribution of bean seed worldwide. USCR-7 possesses the I and bc-3 gene combination that conditions an immune reaction to all strains ( we tested US-1, US-7, NL-8, US-3, US-5, NY15, Russian, NL-3, NL-5, US-6, and NL-4). Presence of the hypostatic I gene was confirmed by presence of the linked DNA marker SW13 (SCAR). USCR-9, is recessive for I gene, but possesses the bc-3 gene for resistant to all virus strains. These lines exhibited resistance to ashy stem blight and rust during epidemics in Puerto Rico. USCR-7 possesses the Co-1 gene for resistance to race 73 and segregates for the Co-2 gene for resistance to race 7 anthracnose; whereas USCR-8 is susceptible to both races.