Epistasis in cassava adapted to midaltitude valley environments

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cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.creator.identifierHernan Ceballos: 0000-0002-8744-7918
cg.identifier.doihttps://doi.org/10.2135/cropsci2004.0600en
cg.isijournalISI Journalen
cg.issn1435-0653en
cg.issue4en
cg.journalCrop Scienceen
cg.reviewStatusPeer Reviewen
cg.subject.ciatBIODIVERSITYen
cg.subject.ciatCASSAVAen
cg.subject.ciatGENETIC RESOURCESen
cg.subject.ciatPLANT BREEDINGen
cg.volume45en
dc.contributor.authorPérez Velásquez, Juan Carlosen
dc.contributor.authorCeballos, H.en
dc.contributor.authorJaramillo, Gustavoen
dc.contributor.authorMorante, Nen
dc.contributor.authorCalle, F.en
dc.contributor.authorArias, B.en
dc.contributor.authorBellotti, Anthony C.en
dc.date.accessioned2014-09-24T08:42:06Zen
dc.date.available2014-09-24T08:42:06Zen
dc.identifier.urihttps://hdl.handle.net/10568/43413
dc.titleEpistasis in cassava adapted to midaltitude valley environmentsen
dcterms.abstractLittle is known about the inheritance of agronomic traits in cassava (Manihot esculenta Crantz). The vegetative multiplication of cassava allows cloning of individual genotypes, and separates environmental from genetic variation in the within-family variation. Knowing the magnitude of between- and within-family variation is important for defining breeding strategies and for measuring different components of genetic variances, particularly the seldom-estimated epistasis. A group of nine genotypes, adapted to midaltitude environments, was used for a diallel study. Thirty clones were obtained from every F1 cross (each clone was represented by six plants), and planted in three replications at two locations. Statistical differences among crosses were found for fresh-root yield, harvest index, root dry-matter content, and reaction to mites (Mononychellus tanajoa Bondar) and to whiteflies (Aleurotrachelus socialis Bondar). General combining ability (GCA) was significant for all traits except fresh-root yield and dry-matter content, and specific combining ability (SCA) was significant for all traits except whitefly damage score. Fresh-root yield was the only trait with significant epistatic effects, which, combined with a large dominance variance, suggested a prevalence of nonadditive effects. The introduction of inbreeding would be one approach for the efficient exploitation of these nonadditive effects found for fresh-root yield. For the remaining traits, epistasis was negligible and current schemes exploiting additive effects may suffice.en
dcterms.accessRightsLimited Access
dcterms.available2005-07
dcterms.extentpp. 1491-1496en
dcterms.issued2005-07
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherWileyen
dcterms.subjectmanihot esculentaen
dcterms.subjectgenetic variationen
dcterms.subjectdiallel crossingen
dcterms.subjectgene interactionen
dcterms.subjectaleurotrachelus socialisen
dcterms.subjectmononychellus tanajoaen
dcterms.subjectvariación genéticaen
dcterms.subjectcruzamiento dialeloen
dcterms.subjectinteracción de genesen
dcterms.typeJournal Article

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