1. Department of Plant Sciences, Microbiology and Biotechnology, College of Natural Sciences, Makerere University, Kampala, P. O. Box 7062, Uganda
2. Department of Biological Sciences, Faculty of Science, Islamic University in Uganda, Mbale, P.O. Box 2555, Uganda
3. National Banana Research Program, National Agricultural Research Organization (NARO), Kampala, P.O. Box 7065, Uganda
4. Department of Plant Biology and The Genome Center, College of Biological Sciences, University of California, Davis, CA, U.S.A.