1. Graduate School of Bioagricultural SciencesNagoya University Nagoya Aichi 464‐8601 Japan
2. Department of Genomics and Evolutionary Biology, National Institute of Genetics Mishima Shizuoka 411‐8540 Japan
3. International Center for Research and Education in AgricultureNagoya University Nagoya Aichi 464‐8601 Japan
4. Department of HorticultureJomo Kenyatta University of Agriculture and Technology Nairobi Kenya
5. Kihara Institute for Biological ResearchYokohama City University Yokohama Kanagawa 244‐0813 Japan
6. PRESTJST Kawaguchi Saitama 332‐0012 Japan