1. Division of Soil and Water Management; KU Leuven; Kasteelpark Arenberg 20 Box 2459 3001 Heverlee Belgium
2. Laboratory of Gene Technology; KU Leuven; Kasteelpark Arenberg 21 Box 2462 3001 Heverlee Belgium
3. Department of Biological Sciences; Institute for Bioinformatics and Evolutionary Studies, University of Idaho; Moscow Idaho USA