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Further Evidence on the Origin of the Cultivated Winged Bean, Psophocarpus tetragonolobus (L.) DC. (Fabaceae): Chromosome Numbers and the Presence of a Host-Specific Fungus

Daniel K. Harder and Joseph Smartt
Economic Botany
Vol. 46, No. 2 (Apr. - Jun., 1992), pp. 187-191
Published by: Springer on behalf of New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/4255428
Page Count: 5
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Further Evidence on the Origin of the Cultivated Winged Bean, Psophocarpus tetragonolobus (L.) DC. (Fabaceae): Chromosome Numbers and the Presence of a Host-Specific Fungus
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Abstract

Further evidence on the origin of the cultivated winged bean (Psophocarpus tetragonolobus (L.) DC.) is presented. Recent evidence concerning chromosome numbers of previously unavailable species in the genus and observational evidence of false rust (Synchytrium psophocarpi (Rac.) Gäumann) on P. grandiflorus Wilczek in Zaïre is discussed. Consideration includes previously published studies on morphology and cytology to support an African center of origin and points to P. grandiflorus as the progenitor species of the cultivated winged bean. /// Neue Daten bezüglich der Abstammung der kultivierten Goabohne (P. tetragonolobus (L.) DC.) werden vorgelegt. Chromosomenzahlen bislang unzugänglicher Arten der Gattung, sowie Beobachtungen am Falschen Rost (Synchytrium psophocarpi (Rac.) Gäumann) auf P. grandiflorus Wilczek werden im Zusammanhang mit bereits publizierten morphologischen und cytologischen Daten diskutiert. Die Ergebnisses unterstützen die Annahme eines Ursprungszentrums der Gattung in Afrika und deuten auf P. grandiflorus als die wilde Urform der Goabohne hin.

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