Affiliation: | (1) Laboratorium Plantengenetika, Vrije Universiteit Brussel, Paardenstraat 65, B-1640 St. Genesius Rode, Belgium;(2) Foundation for Agricultural Plant Breeding, SVP, P.O. Box 117, NL-6700 AC Wageningen, The Netherlands;(3) Present address: Phytotec, Pl. L. Pasteur 1, B-1348 Louvain-La-Neuve, Belgium |