|Pastor corrales, Marcial - Talo|
Submitted to: Journal of Plant Registrations
Publication Type: Peer reviewed journal
Publication Acceptance Date: 2/15/2006
Publication Date: 6/1/2007
Citation: Pastor Corrales, M.A., Kelly, J.D., Steadman, J.R., Lindpren, D.T., Stavely, J.R., Coyne, D.P. 2007. Registration of six great northern bean germplasm lines developed for enhanced resistance to rust and bean common mosaic and necrosis potyviruses. Journal of Plant Registrations. 1:77-79. Interpretive Summary: Rust, bean common mosaic and bean common mosaic necrosis are economically important and often deadly diseases of dry and snap beans worldwide. Because these diseases are caused by highly variable pathogens, it is difficult to find long-lasting genetic resistance. In collaboration with the Michigan Experiment Station and the University of Nebraska Agricultural Research Division, we developed and released six great northern bean breeding lines that are unique for their genetic resistance to these pathogens. They are the first and only great northern beans in the world with four genes for resistance to rust plus two genes for resistance to two virus diseases. Scientists, particularly plant breeders from universities, experiment stations and private industry will benefit from these breeding lines when they use them to improve their local varieties.
Technical Abstract: Great northern common bean (Phaseolus vulgaris L.) germplasm lines BelMiNeb (BMN)-Rust and Mosaic Resistant (RMR)-8, -9, -10, -11, -12, and -13 were developed by the ARS-USDA Vegetable Laboratory at Beltsville, MD, in collaboration with the Michigan Experiment Station and the University of Nebraska Agricultural Research Division. These high yielding, upright short vine, type II, white seeded, great northern dry bean germplasm lines are the first and only great northern bean lines to combine four genes for resistance to control the highly variable bean rust pathogen, Uromyces appendiculatus, with two genes for resistance to the also variable potyviruses that cause bean common mosaic (BCMV) and bean common mosaic necrosis (BCMNV). These beans combine the Ur-6 with Ur-3, Ur-4, and Ur-11 rust resistance genes and the bc-3 and I genes for resistance to BCMV and BCMNV. The Ur-3 and Ur-11 genes are from beans of the Middle American gene pool while Ur-4 and Ur-6 are from beans of the Andean gene pool. These genes provide resistance to all known strains of bean rust pathogen including 90 races of the pathogen that have been identified and maintained at Beltsville, MD, and to all known strains of BCMV and BCMNV. The rust resistance was confirmed by inoculation under greenhouse conditions with eight selected races of U. appendiculatus that produce well proven and characteristic reactions in bean plants that have the Ur-3, Ur-4, Ur-6, and Ur-11 genes. Mosaic resistance was confirmed from inoculation with BCMV strains NL4 and/or US 5, and BCMNV strain NL3. Presence of the I gene was reconfirmed by using molecular markers tightly linked to the I gene.