1. National Institute of Agrobiological Sciences, Genetic Diversity Department, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602 Japan
2. Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, United States Department of Agriculture, Agricultural Research Service, Peoria, Illinois 61604-3999
3. Japan International Research Center for Agricultural Sciences, Biological Resources Division, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8686 Japan
4. Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria (INTA-EEA) Marcos Juárez, Casilla de Correo 21, 2580 Marcos Juárez, Córdoba, Argentina