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 601 (pink kidney), Cornell 602 (white kidney), Cornell 603 (dark red kidney), Cornell 604 (black bean), Cornell 605 (light red kidney), and Cornell 606 (black kidney), 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-1150 regional project.
White mold is a serious disease of common bean worldwide reducing both yield and quality (Kerr et al., 1978). Host plant resistance can be conferred through both plant architecture and physiological resistance (Kolkman and Kelly, 2003). White mold resistance can be selected through a technique known as the “straw test,” which shows a very high correlation with field resistance (Petzoldt and Dickson, 1996). This test was used to develop the six breeding lines by modification of the straw test to inoculate two plant petioles (Griffiths et al., 2004).
Kerr, E.D., Steadman, J.R. & Nelson, L.A. 1978 Estimation of white mold disease reduction of yield and yield components of dry edible beans Crop Sci. 18 275 279
Otto-Hansen, L.K. & Steadman, J. 2008 Use of multi-site screening to identify partial resistance to white mold in common bean in 2007 Bean Improv. Coop. 51 214 215
Steadman, J.R. & Otto-Hansen, L.K. 2005 Identification of partial resistance to Sclerotinia sclerotiorum in common bean at multiple locations Annu. Rpt. Bean Improv. Coop. 48 124 125
Steadman, J.R. & Otto-Hansen, L.K. 2006 Use of multi-sites to identify partial resistance to Sclerotinia sclerotorum in common bean over multiple years Annu. Rpt. Bean Improv. Coop. 49 91 92
Steadman, J.R. & Otto-Hansen, L.K. 2007 Identification of partial resistance to Sclerotinia sclerotiorum in common bean at multiple locations in 2006 Annu. Rpt. Bean Improv. Coop. 50 133 134