1. National Genebank of Tunisia, Boulvard leader Yasser Arafat; ZI Charguia 1 1080 Tunis Tunisia
2. USDA-ARS; National Lab. for Genetic Resources Preservation; 1111 South Mason St. Fort Collins CO 80521 USA
3. International Center for Tropical Agriculture (CIAT); Km 17, Recta Cali-Palmira, Apartado Aéreo 6713 763537 Cali Colombia
4. Natural Resource Ecology Lab.; Colorado State Univ.; Fort Collins CO 80524-1499 USA
5. USDA-ARS, Dep. of Horticulture; Univ. of Wisconsin-Madison; 1575 Linden Dr. Madison WI 53706 USA
6. Dep. de Ciencias Ambientales y Recursos Naturales and Centro Iberoamericano de la Biodiversidad; Univ. de Alicante; PO Box 99 ES-03080 Alicante Spain