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ARS Home » Pacific West Area » Pullman, Washington » Grain Legume Genetics Physiology Research » Research » Publications at this Location » Publication #405067
Research Project: Enhanced Agronomic Performance and Disease Resistance in Edible Legumes

Location: Grain Legume Genetics Physiology Research

Title: Registration of ‘USDA Diamondback’ slow-darkening pinto bean

Author
item Miklas, Phillip - Phil
item SOLER-GARZON, ALVARO - Washington State University
item Pastor Corrales, Marcial
item Cichy, Karen

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/28/2023
Publication Date: 1/8/2024
Citation: Miklas, P.N., Soler-Garzon, A., Pastor Corrales, M.A., Cichy, K.A. 2024. Registration of ‘USDA Diamondback’ slow-darkening pinto bean. Journal of Plant Registrations. 18(1):52-60. https://doi.org/10.1002/plr2.20334.
DOI: https://doi.org/10.1002/plr2.20334

Interpretive Summary: Pinto bean is the most important dry bean market class grown in the US where it represents 65% of all dry beans produced on an annual basis. New pinto bean cultivars with improved traits including higher seed yields, yield stability, disease resistance, tolerance to drought, and upright architecture, are sought by growers. We developed a new pinto bean cultivar USDA Diamondback which possesses all of the above listed traits desired by farmers. It also has the bright or slow dark seed coat trait which reduces darkening of seeds in storage. Slow dark pintos are preferred by export markets. USDA-Diamondback also has above average canning quality which should benefit processors. This cultivar was released in 2022 and a commercial license was granted to a seed company in 2022. USDA Diamondback provides growers and processors with a new 'bright' pinto bean cultivar that yields well across diverse environments and is a good canner.

Technical Abstract: The pinto bean (Phaseolus vulgaris L.), ‘USDA Diamondback’, was released by the USDA-ARS in 2022 as a high-yielding pinto bean cultivar with upright architecture and the slow darkening seed coat trait. It was bred for tolerance to multiple abiotic stresses in a “purgatory” plot purposely managed to have compacted soil, low soil fertility, and intermittent drought conditions. Conversely, selection for high-yield potential was conducted in ‘nonstress’ trials with tillage, irrigations and fertilizers applied for optimal production. USDA Diamondback exhibits wide adaption to production regions across the U.S. as evidenced by an average seed yield of 3808 kg ha-1 across 14 location-years in the Cooperative Dry Bean Nursery. Virus testing and resistance gene-linked markers indicate USDA Diamondback has a three-gene combination: bc-ud, bc-1, and bc-3, that confers durable resistance to all known strains of Bean common mosaic virus and Bean common mosaic necrosis virus. A similar combination of pathogen and marker testing indicated USDA Diamondback possess the Ur-3 and Ur-6 genes for resistance to bean rust. The seed size, appearance, and canning quality characteristics of USDA Diamondback meets the industry standards for packaging and processing.