1. Univ. of Hohenheim, Institute of Plant Breeding, Seed Science and Population Genetics; Fruwirthstr. 21 D-70599 Stuttgart Germany
2. National Food Institute, Technical Univ. of Denmark; 2800 Kgs. Lyngby Denmark
3. Institut National de Recherche Agronomique du Niger (INRAN); Maradi Niger
4. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT); BP 12404 Niamey Niger