BLACK DRY BEAN GERMPLASM RESOURCES RICH IN RESISTANCE TOANTHRACNOSE

摘要

Dry bean is prone to diseases. One of the most serious diseases is anthracnose, caused by Colletotrichum lindemuthianum (Sacc. & Magnus) Briosi & Cav. Anthracnose resistance has been reported in various bean market classes including in black bean. Using artificial inoculation and molecular markers, Dongfang et al. (2008) revealed the presence of Co-1, Co-2, and Co-3 genes in the twenty selected cultivars grown in Manitoba, Canada. However, not one of the black beans evaluated had resistance to eitherrace 73 or 105, the major anthracnose races in the region. The black bean cultivars currently grown in the region are generally susceptible to anthracnose. Chemical control of anthracnose has been the common practice in commercial production, but it iscostly. Use of resistant cultivars is considered the most effective management strategy for control of anthracnose in dry bean. This study was conducted to evaluate black bean germplasm for resistance to races 73 and 105, and provide much needed publicly available breeding materials for dry bean cultivar development in Canada.