1. Plant-Microbe Interactions; Department of Biology; Utrecht University; PO Box 800.56 3508 TB Utrecht The Netherlands
2. Laboratory of Entomology; Wageningen University; PO Box 16 6700 AA Wageningen The Netherlands
3. Laboratory of Genetics; Wageningen University; PO Box 16 6700 AA Wageningen The Netherlands
4. Bioinformatics; Department of Biology; Utrecht University; PO Box 800.56 3508 TB Utrecht The Netherlands
5. Keygene N.V.; PO Box 216 6700 AE Wageningen The Netherlands