Registration of Common Bacterial Blight, Rust and Bean Common Mosaic Resistant Great Northern Common Bean Germplasm Line ABC‐Weihing

Abstract

Great northern common bean ( Phaseolus vulgaris L.) germplasm line ABC‐Weihing (Reg. No. GP‐246, PI 647964) was developed by the University of Nebraska Agricultural Research Division in cooperation with USDA‐ARS and released in 2006. This line, tested as NE1‐05‐4, was bred specifically for enhanced resistance to common bacterial blight (CBB), a major seed borne disease of common bean caused by the bacterium Xanthomonas campestris pv. phaseoli (Smith) Dye ( Xcp) . ABC‐Weihing is a great northern BC 5 F 3:6 line obtained from five backcrosses (‘Weihing’*5//‘Chase’/XAN 159). The first cross was made in spring 1997. Only BC n F 1 plants resistant to Xcp isolates Dominican Republic DR‐7 and Nebraska SC4A, as determined by multiple needle leaf inoculation tests in the greenhouse, were used for successive backcrossing. In addition to phenotypic selection for CBB resistance, marker‐assisted selection for the resistant QTL‐linked marker SU91 was conducted in the BC 1 F 1 , BC 2 F 1 , and ABC‐Weihing. When inoculated with Nebraska Xcp strains in the field, ABC‐Weihing exhibited resistance in both 2005 and 2006. ABC‐Weihing has Ur‐3 and Ur‐6 genes for resistance to common bean rust and carries the single dominant hypersensitive I gene that provides resistance to all non‐necrotic strains of the Bean common mosaic virus (BCMV). ABC‐Weihing has bright white seed, blooms 45 d after planting, and is a midseason bean maturing 92 d after planting.