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dc.contributor.authorHahn, S.K.
dc.contributor.authorBai, K.V.
dc.contributor.authorAsiedu, Robert
dc.date.accessioned2019-12-04T11:36:02Z
dc.date.available2019-12-04T11:36:02Z
dc.date.issued1990
dc.identifier.citationHahn, S.K., Bai, K.V. & Asiedu, R. (1990). Tetraploids, triploids, and 2n pollen from diploid interspecific crosses with cassava. Theoretical and Applied Genetics, 79(4), 433-439.
dc.identifier.issn1432-2242
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6060
dc.description.abstractInterspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first time in cassava. Occurrence of relatively high frequencies (0.1%–35.6%) of 2n pollen and of apomixis seems to be associated with sexual polyploidization. The tetraploids and triploids were very vigorous and one of the tetraploids performed as well as the best variety in uniform yield trials conducted in Nigeria. These spontaneous polypoloids provide greater genetic variation and offer an opportunity to breed radically new cassava varieties. Approaches for isolating and utilizing the polyploid cassava clones for varietal and population improvement are discussed.
dc.language.isoen
dc.subjectCassava
dc.subjectPolyploidy
dc.subjectPollen
dc.subjectApomixis
dc.titleTetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.authorship.typesCGIAR single centre
cg.iitasubjectCassava
cg.accessibilitystatusLimited Access
local.dspaceid105990
cg.identifier.doihttps://doi.org/10.1007/BF00226148


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