Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set

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dc.creatorObidiegwu, J.E.
dc.creatorLoureiro, J.
dc.creatorEne-Obong, E.E.
dc.creatorRodríguez, E.
dc.creatorKolesnikova-Allen, M.
dc.creatorSantos, C.
dc.creatorMuoneke, C.
dc.creatorAsiedu, Robert
dc.date2009-10
dc.date2018-01-15T10:50:48Z
dc.date2018-01-15T10:50:48Z
dc.date.accessioned2026-06-27T16:03:52Z
dc.descriptionThe Guinea yams, Dioscorea cayenensis Lam. and D. rotundata Poir. (D. cayenensis–D. rotundata complex), represent a highly importantcrop, widely distributed in the humid and semi-humidtropics. The ploidy levels of 170 accessions of the core set of Guinea yams from West African countries was determined using flow cytometry with propidium iodide staining. One hundred and eight of the genotypes were found to be tetraploid, 47 were hexaploid and five were octoploid. One mixoploid individual containing tetraploid and hexaploid nucleiwas also detected. A deeper analysis considering each separate taxon revealed that while for D. rotundata the majority of individuals were tetraploid, for D. cayenensis this ploidy level was not detected in any of the accessions. Also, no association between ploidy level and place of cultivation was found for the evaluated germplasm. The obtained data is highly valuable for breeding programs of Guinea yam, especially for the optimization of future hybridization experiments directed to the genetic improvement of this economically important crop
dc.identifierhttps://hdl.handle.net/10568/90195
dc.identifier.urihttp://hdl.handle.net/123456789/121463
dc.languageen
dc.publisherSpringer
dc.rightsLimited Access
dc.sourceObidiegwu, J., Loureiro, J., Ene-Obong, E., Rodriguez, E., Kolesnikova-Allen, M., Santos, C., ... & Asiedu, R. (2009). Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set. Euphytica, 169(3), 319-326.
dc.subjectbreeding
dc.subjectdioscorea cayenensis
dc.subjectflow cytometry
dc.subjectgenetic resources
dc.subjectgermplasm
dc.subjectploidy level
dc.titlePloidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)