|Beaver, James - U OF PUERTO RICO|
|Steadman, James - U OF NEBRASKA|
|Silbernagel, Matt - ARS-RETIRED|
|Freytag, George - ARS-RETIRED|
Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 6, 1996
Publication Date: N/A
Interpretive Summary: Navy beans are grown on 1/2 million acres across the United States with most production occuring in Michigan, North Dakota, and Minnesota. Bean rust is a serious disease in these states. Most navy bean seed is western grown in Idaho and Washington where bean common mosaic virus (BCMV), a serious seedborne disease, occurs. We developed three navy bean lines with hresistance against all strains of bean common mosaic virus and to the race of rust most prevalent in the Midwest. In addition, these lines are adapted to both tropical and temperate environments. These lines are intended to be used by bean breeders as a source of BCMV and rust resistance. Navy bean lines with multiple disease resistance will reduce pesticide use, ensuring delivery of a safer product to the consumer and safer environment from reduced chemical residues. Furthermore, incorporation of these resistances will lower the input costs to growers, thus, providing them with competitive advantage in the world marketplace.
Technical Abstract: Three bean common mosaic virus (BCMV) resistant navy bean (Phaseolus vulgaris L.) germplasm lines, TARS-VR-1s, TARS-VR-7s, and TARS-VR-8s were developed. These lines combine the dominant I and recessive bc-3 resistance genes to BCMV with high yield potential, semi-upright, short- vine to long-vine growth habits (Types 2a and 2b), and resistance to bean rust (Uromyces appendiculatus). The yield potential, plant architecture (growth habit), seed quality, and rust resistance of these navy bean lines are superior to the moderate yield potential, prostrate Type III growth habit, elongated and flattened kidney-shaped seed, and rust susceptibility of the white-seeded dry bean lines TARS-IM-1 and TARM-IM-2 released in 1986 with the same bc-3-protected I gene resistance to BCMV.