Conventional breeding, marker-assisted selection, genomic selection and inbreeding in clonally propagated crops: a case study for cassava

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dc.creatorCeballos, H.
dc.creatorKawuki, Robert S.
dc.creatorGracen, V.E.
dc.creatorYencho, George Craig
dc.creatorHershey, Clair H.
dc.date2015-09
dc.date2015-06-24T15:39:06Z
dc.date2015-06-24T15:39:06Z
dc.date.accessioned2026-06-27T14:47:05Z
dc.descriptionConsolidates relevant molecular and phenotypic information on cassava to demonstrate relevance of heterosis, and alternatives to exploit it by integrating different tools. Ideas are useful to other asexually reproduced crops. Asexually propagated crops offer the advantage that all genetic effects can be exploited in farmers’ production fields. However, non-additive effects complicate selection because, while influencing the performance of the materials under evaluation, they cannot be transmitted efficiently to the following cycle of selection. Cassava can be used as a model crop for asexually propagated crops because of its diploid nature and the absence of (known) incompatibility effects. New technologies such as genomic selection (GS), use of inbred progenitors based on doubled haploids and induction of flowering can be employed for accelerating genetic gains in cassava. Available information suggests that heterosis, non-additive genetic effects and within-family variation are relatively large for complex traits such as fresh root yield, moderate for dry matter or starch content in the roots, and low for defensive traits (pest and disease resistance) and plant architecture. The present article considers the potential impact of different technologies for maximizing gains for key traits in cassava, and highlights the advantages of integrating them. Exploiting heterosis would be optimized through the implementation of reciprocal recurrent selection. The advantages of using inbred progenitors would allow shifting the current cassava phenotypic recurrent selection method into line improvement, which in turn would allow designing outstanding hybrids rather than finding them by trial and error.
dc.identifierhttps://hdl.handle.net/10568/67154
dc.identifier.urihttp://hdl.handle.net/123456789/88314
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceCeballos, Hernán; Kawuki, Robert S.; Gracen, Vernon E.; Yencho, Craig G.; Hershey, Clair H.. 2015. Conventional breeding, marker-assisted selection, genomic selection and inbreeding in clonally propagated crops: a case study for cassava. Theoretical and Applied Genetics 128(9): 1647-1667.
dc.subjectmanihot eculenta
dc.subjectplant breeding
dc.subjectgenomics
dc.subjectgenetic markers
dc.subjectcloning
dc.subjectheterosis
dc.subjectinbreeding
dc.subjectgenotypes
dc.subjectinbreeding depression
dc.subjectcassava
dc.subjectfitomejoramiento
dc.subjectgenómica
dc.subjectmarcadores genéticos
dc.subjectclonación
dc.subjectendogamia
dc.subjectgenotipos
dc.subjectdepresión por consanguinidad
dc.titleConventional breeding, marker-assisted selection, genomic selection and inbreeding in clonally propagated crops: a case study for cassava
dc.typeJournal Article

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Centro Internacional de Agricultura Tropical (CIAT)