A cassava clonal evaluation trial based on a new cassava breeding scheme

Vista sencilla de ítem
dc.creatorOjulong, H
dc.creatorLabuschagne, Maryke T.
dc.creatorFregene, Martin A.
dc.creatorHerselman, L.
dc.date2008-03
dc.date2014-09-24T08:41:39Z
dc.date2014-09-24T08:41:39Z
dc.date.accessioned2026-06-27T14:43:07Z
dc.descriptionCassava (Manihot esculenta) breeding at the earlier stages so far has been mainly based on a mass phenotypic recurrent selection, as little data is taken. This has resulted in a long breeding cycle and lack of organised information on the breeding values of parental lines used in the breeding programmes. The International Institute of Tropical Agriculture (CIAT) recently initiated a scheme to try and correct this, by introduction of replication and blocking in the clonal evaluation trial (CET) and collection of data on all genotypes at early stages of breeding. The aim of the study was to evaluate a CET using the new breeding scheme. Replicating and blocking of clones improved the accuracy of the data obtained. High broad-sense heritability values, comparable to those at advanced selection stages, were obtained, as environmental effects were minimised. The highest was for harvest index (HI) (0.80), followed by cassava frogskin disease (CFSD) (0.79), dry matter content (DMC) (0.75) fresh and dry root yields (DRY) (0.73), root weight (RtWt) (0.61), number of commercial roots (0.60) and roots per plant (RtPlt) (0.43). DMC, HI and RtWt were identified as important variables in selection and determination of economic yield at early stages of selection.
dc.identifierhttps://hdl.handle.net/10568/43117
dc.identifier.urihttp://hdl.handle.net/123456789/86357
dc.languageen
dc.publisherSpringer
dc.rightsLimited Access
dc.subjectmanihot esculenta
dc.subjectclones
dc.subjectgenetic inheritance
dc.subjectplant breeding
dc.subjectherencia genética
dc.subjectfitomejoramiento
dc.titleA cassava clonal evaluation trial based on a new cassava breeding scheme
dc.typeJournal Article

Archivos

Colecciones

Centro Internacional de Agricultura Tropical (CIAT)