Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana

Vista sencilla de ítem
dc.creatorParkes, Elizabeth Y.
dc.creatorFregene, Martin A.
dc.creatorDixon, A.
dc.creatorBoakye-Peprah, B.
dc.creatorLabuschagne, Maryke T.
dc.date2013-11
dc.date2016-10-27T08:31:05Z
dc.date2016-10-27T08:31:05Z
dc.date.accessioned2026-06-27T15:54:22Z
dc.descriptionBreeding for resistant genotypes is the best strategy to offset the destructive effects of cassava mosaic disease (CMD) and cassava bacterial blight (CBB). Two sets of diallel parents were selected for the forest and the savannah ecological zones in Ghana based on good levels of resistance to CMD and CBB. Both sets were crossed in a half-diallel design. The first set of seven progenitors and their 21 F1 progenies were planted in a randomised complete block design (RCBD) with three replications in two different locations for two seasons in the forest ecology. The second set of five progenitors and their 10 F1 progenies were planted in a RCBD with three replications in two locations in the coastal savannah ecological zone of Ghana. Both experiments were evaluated for CMD and CBB resistance, fresh root yield, dry root yield, root number, harvest index, dry matter content, plant height at maturity and height at first branching, levels of branching and plant vigour. Results of the combined analysis of variance revealed that the environment effect was significant for all the traits. General combining ability and specific combining ability effects were significant for most of the traits. Narrow sense heritability was significant for plant vigour, root number, CMD and CBB in both the zones. CMD and root number also had a predictability ratio of close to one, indicating the importance of additive gene effects
dc.identifierhttps://hdl.handle.net/10568/77451
dc.identifier.urihttp://hdl.handle.net/123456789/117010
dc.languageen
dc.publisherSpringer
dc.rightsLimited Access
dc.sourceParkes, E., Fregene, M., Dixon, A., Boakye-Peprah, B. & Labuschagne, M. (2013). Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana. Euphytica, 194(1), 13-24.
dc.subjectcassava
dc.subjectdiallel
dc.subjectresistance
dc.subjectbreeding
dc.titleCombining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Agricultura Tropical (IITA)