The New York State Agricultural Experiment Station announces the release of six dry bean (Phaseolus vulgaris L.) breeding lines with resistance to white mold [Sclerotinia sclerotiorum (Lib.) de Bary]. These breeding lines, ‘Cornell 607’ dark red kidney (DRK), ‘Cornell 608’ DRK, ‘Cornell 609’ black bean (BB), ‘Cornell 610’ BB, ‘Cornell 611’ light red kidney (LRK), and Cornell 612 LRK, represent germplasm with high levels of resistance to white mold developed through greenhouse selection and evaluation in multistate greenhouse and field comparisons through the W-2150 regional project.
White mold is an important disease of common bean worldwide reducing both yield and quality of seed harvested. Plant protection from white mold can be conferred through both plant architecture and physiological resistance (Kolkman and Kelly, 2003; Schwartz et al., 1978). Physiological resistance can be selected using several approaches for the selection of breeding lines (Hunter et al., 1981; Schwartz et al., 1987; Steadman et al., 1997). A technique known as the “straw test,” which shows a very high correlation with field resistance, was used in the selection of these materials (Petzoldt and Dickson, 1996; Singh and Teran, 2008; Teran and Singh, 2009). This test was used to develop the six breeding lines by inoculating two petioles on each plant in the populations as described previously (Griffiths et al., 2004; Teran et al., 2006).
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