info:oai:icrisat:2540info:ofi/fmt:xml:xsd:journalHoisingtonDHoisington, DKhairallahMKhairallah, MReevesTReeves, TRibautJ MRibaut, J MSkovmandBSkovmand, BTabaSTaba, SWarburtonMWarburton, MPlant genetic resources: What can they contribute toward increased crop productivity? Proceedings of the National Academy of Sciences1091-64901999965937-594311article