Genetic diversity in sweetpotato [Ipomoea batatas (L.) Lam.] in relationship to geographic sources as assessed with RAPD markers

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dc.creatorGichuki, S.T.
dc.creatorBerenyi, M.
dc.creatorZhang, D.
dc.creatorHermann, M.
dc.creatorSchmidt, J.
dc.creatorGlössl, J.
dc.creatorBurg, J.
dc.date2003-06
dc.date2024-05-15T21:22:32Z
dc.date2024-05-15T21:22:32Z
dc.date.accessioned2026-06-27T17:59:03Z
dc.descriptionAvailable evidence shows that sweetpotato originated from either Central or South American lowlands with subsequent dispersal to North America, Europe, Africa, Asia and the pacific islands. A total of 71 polymorphic RAPD molecular markers were used to assess the genetic relationships amongst 74 sweetpotato varieties originating from a total of 23 sweetpotato producing countries within six geographical regions, namely, South America, Central America/Caribbean, United States of America (USA), East Africa, Asia and Oceania. An Analysis of Molecular Variance (AMOVA) indicated that 93.4% of the total variance was due to the differences between genotypes within regions. The difference between regions was significant (P < 0.001) but only contributed 6.6% to the variance. Genetic distance (PhiST) calculated with AMOVA and multidimensional scaling (MDS) revealed that the South American and the Central American/Caribbean genotypes formed two separate clusters. East African varieties, which have unique characteristics from other traditional varieties, were distinct from other traditional varieties from South America and Oceania. These results support the reported hypothesis of the origin and dispersal of the sweetpotato and indicate that the primary centre of diversity probably has two distinct genepools. It is proposed that the dispersal of the sweetpotato from its origin may have mainly involved varieties from Central America/Caribbean as opposed to varieties from South America. There is an indication that new genepools may be evolving in Africa and Asia due to hybridisation and adaptation to the local environments.
dc.identifierhttps://hdl.handle.net/10568/141863
dc.identifier.urihttp://hdl.handle.net/123456789/151474
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceGichuki, S.T.; Berenyi, M.; Zhang, D.; Hermann, M.; Schmidt, J.; Glössl, J.; Burg, J. 2003. Genetic Resources and Crop Evolution. Genetic Resources and Crop Evolution. ISSN 1573-5109. 50(4), 429–437. https://doi.org/10.1023/a:1023998522845
dc.subjectgenetic diversity (as resource)
dc.subjectgermplasm
dc.subjectipomoea batatas
dc.subjectmarker-assisted selection
dc.subjectsweet potatoes
dc.titleGenetic diversity in sweetpotato [Ipomoea batatas (L.) Lam.] in relationship to geographic sources as assessed with RAPD markers
dc.typeJournal Article

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