GENETIC IMPROVEMENT OF DRY BEAN FOR RESISTANCE TO WHITE MOLDUSING A MAGIC POPULATION

摘要

White mold (Sclerotinia scleriotorum Lib. de Bary) is considered one of the most important diseases for dry bean in the U.S. with seed yield losses up to 100% (Singh and Schwartz, 2010). North Dakota, the leading state for dry bean production, harvested approximately 275,000 ha in 2017 representing more than $300 million. The use of resistant varieties is an effective strategy for combatting diseases. However, for white mold, resistance has been difficult to incorporate because of low heritability, cumbersome screening methods, few sources of resistance, and inadequate breeding methods (Carneiro et al., 2011). To overcome these limitations, we used a Multi-parent Advanced Generation Inter-Crosses (MAGIC) population to generate higher recombination and increased genetic diversity to enable fine mapping QTL (Osorno et al., 2017), and to facilitate development of improved partially resistant lines with good agronomic performance.