1. Bean Program, Crops for Nutrition and Health International Center for Tropical Agriculture (CIAT) Cali Colombia
2. Molecular Plant Breeding Institute of Agricultural Sciences, ETH Zurich 8092 Zurich Switzerland
3. Crop Science Institute of Agricultural Sciences, ETH Zurich 8092 Zurich Switzerland
4. Plant Pathology Institute of Integrative Biology, ETH Zurich 8092 Zurich Switzerland