Heritability, combining ability and inheritance of storage root dry matter in yam beans

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cg.authorship.typesCGIAR single centre
cg.contributor.affiliationMakerere University
cg.contributor.affiliationInternational Potato Center
cg.contributor.affiliationRwanda Agriculture Board
cg.creator.identifierWolfgang Gruneberg: 0000-0002-8306-6704
cg.identifier.urlhttps://www.ajol.info/index.php/acsj/article/view/152331/141929
cg.issn1021-9730
cg.journalAfrican Crop Science Journal
cg.subject.cipGENETICS, GENOMICS AND CROP IMPROVEMENT SCIENCES GGCI
cg.subject.cipCROP PROTECTION
dc.contributor.authorAgaba, R.
dc.contributor.authorTukamuhabwe, Phineas
dc.contributor.authorRubaihayo, P.R.
dc.contributor.authorMwanga, Robert O.M.
dc.contributor.authorSsenyonjo, A.
dc.contributor.authorNdirigwe, J.
dc.contributor.authorTumwegamire, Silver
dc.contributor.authorGrüneberg, W.J.
dc.date.accessioned2018-01-26T02:45:59Zen
dc.date.available2018-01-26T02:45:59Zen
dc.identifier.urihttps://hdl.handle.net/10568/90589
dc.titleHeritability, combining ability and inheritance of storage root dry matter in yam beansen
dcterms.abstractStorage root dry matter content (RDM) is central to the improvement of consumer and industrial attributes of root crops. Yam bean (Pachyrhizus species) is a legume root crop newly introduced in Uganda, but its adoption may be constrained by low RDM. The objective of this study was to investigate the magnitude of variance for general combining ability (GCA) and specific combining ability (SCA) effects, heritability estimates and inheritance of RDM in yam beans. Progenies of sixteen crosses, generated using the North Carolina (NCII) mating scheme, were evaluated in F1 and F2 field experiments, with three replications at the National Crops Resources Research Institute (NaCRRI), Namulonge in Central Uganda, during the first cropping seasons of April, 2013 and 2014, respectively. Significant (p<0.001) mean squares for general combining ability (GCA), and specific combining ability (SCA) were observed in F1 and F2 generations, demonstrating additive and non-additive genetic inheritance of RDM. High Baker’s ratio in F1 (0.76) and F2 (0.78), and large σ2GCA/σ2SCA (3.13) indicate predominance of additive gene effects. Narrow sense heritability was high in both F1 (0.74) and F2 (0.75), implying that RDM can be improved in yam beans through selection. The results provide a basis for selection of suitable parents for hybridisation and breeding programmes to develop high dry matter yam bean varieties in Uganda.en
dcterms.accessRightsOpen Access
dcterms.audienceScientists
dcterms.audienceCGIAR
dcterms.bibliographicCitationAgaba, R.; Tukamuhabwa, P.; Rubaihayo, P.; Mwanga, R.O.M.; Ssenyonjo, A.; Ndirigwe, J.; Tumwegamire, S.; Gruneberg, W. 2017. Heritability, combining ability and inheritance of storage root dry matter in yam beans. African Crop Science Journal. ISSN 1021-9730. 25:1. 83-95.en
dcterms.extent83-95
dcterms.issued2017-02
dcterms.languageen
dcterms.subjectpachyrhizus erosusen
dcterms.subjectdry matter contenten
dcterms.subjectheritabilityen
dcterms.typeJournal Article

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