INTROGRESSION OF CMV RESISTANCE INTO SNAP BEAN

摘要

Recently, aphid-transmitted viruses have become common in snap bean production areas throughout the Great Lakes region, particularly Wisconsin. Research findings indicate that alfalfa mosaic virus (AMV), cucumber mosaic virus (CMV), and clover yellowvein virus (C1YVV) play important roles in this complex (Grau et al. 2001; 2002; German et al. 2004; Larsen and Eastwell 2004). While AMV and CMV occur most frequently in the Wisconsin snap bean landscape, CMV and C1YVV appear to be the most important due to economic losses related to pod quality including pod malformation and internal and external pod necrosis. Our research effort has focused on CMV (and to a lesser extent AMV) because C1YVV has not consistently been detected each year in Wisconsin. Wehave been unable to identify a source of immunity to CMV, but have identified lines that are consistently symptomless; however, a virus titer can be detected in these lines. The objective of this study is to determine the inheritance of the symptomlesstrait and the correlation with snap bean quality traits.