1. Laboratory for Fruit Breeding and Biotechnology, Division of Crop Biotechnics, Catholic University of Leuven, De Croylaan 42, Heverlee, Leuven, Belgium; Centre Africain Régional de Recherches sur Bananiers et Plantains, P.O. Box 832, Douala, Cameroon; Bioversity International, Parc Scientifique Agropolis II, 34397 Montpellier Cedex 5, France; and Laboratory for Tropical Crop Improvement, Division of Crop Biotechnics, Catholic University of Leuven, Kasteelpark, Arenberg 13, Leuven, Belgium