Relative effects of Uniconazole p and other growth regulators on micropropagation ratio of yam (Dioscorea spp.) plantlets at different growth phases

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationUniversity of Ibadanen
cg.contributor.affiliationFood and Agriculture Organization of the United Nationsen
cg.contributor.affiliationBells University of Science and Technologyen
cg.contributor.affiliationTokyo University of Agricultureen
cg.coverage.countryNigeria
cg.coverage.iso3166-alpha2NG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.howPublishedFormally Publisheden
cg.issn0378-2409en
cg.issue2en
cg.journalJournal of Root Cropsen
cg.reviewStatusPeer Reviewen
cg.subject.iitaYAMen
cg.volume40en
dc.contributor.authorBalogun, M.en
dc.contributor.authorNg, S.Y.C.en
dc.contributor.authorFawole, I.en
dc.contributor.authorShiwachi, H.en
dc.contributor.authorKikuno, H.en
dc.date.accessioned2016-07-11T08:41:32Zen
dc.date.available2016-07-11T08:41:32Zen
dc.identifier.urihttps://hdl.handle.net/10568/76045
dc.titleRelative effects of Uniconazole p and other growth regulators on micropropagation ratio of yam (Dioscorea spp.) plantlets at different growth phasesen
dcterms.abstractScarcity of seed, pest and diseases are major constraints to yam production. Tissue culture techniques of meristem culture combined with heat therapy have been used to produce high-yielding virus-tested plantlets of root crops, which are later multiplied through micropropagation. However, the micropropagation rate is low in yam. We investigated in vitro, the rate of production of new nodes at some Plant growth regulator regimes applied at specific growth phases of yam. Three concentrations each of uniconazole-p (UP), gibberellic, jasmonic (JA) and naphthalene acetic (NAA) acids were applied at single node and primary nodal complex (PNC) formation phases in a split-plot design using two genotypes each of white and water yams. Number of nodes per plantlet was recorded after 16 weeks. The number of new nodes varied significantly with genotype by growth phase interaction and the main effect of PGRs. After 16 weeks, the control, 1.7µM UP and 0.03µM JA had highest means of 7, 9 and 8 nodes per plantlet compared to 2-3 nodes in the GA treatments. Thus, 4,900, 8,100 and 6,400 plantlets can be obtained in I year from a 100-node plant. In D. alata genotypes, addition of PGRs at PNC doubled the number of nodes per plantlet relative to addition at single node stage, while the effect of stage varied with genotype in D. rotundata. There is an important role for GA and its inhibitor-UP on the rate of yam micropropagation. Optimum multiplication rates can be achieved if the right PGR is applied at a standardized growth phase of a particular genotype. Earliness of genotypes seems to be a major factor that will determine the timing of application of PGRs.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationBalogun, M., Ng, S.Y., Fawole, I., Shiwachi, H., & Kikuno, H. (2015). Relative effects of uniconazole-p and other growth regulators on micropropagation ratio of yam (Dioscorea spp.) plantlets at different growth phases. Journal of Root Crops, 40(2), 5-11.en
dcterms.descriptionOpen Access Journalen
dcterms.extentp. 5-11en
dcterms.issued2014
dcterms.languageen
dcterms.subjectdioscoreaen
dcterms.subjectmicropropagationen
dcterms.subjectplantletsen
dcterms.subjectgibberellic aciden
dcterms.subjectjasmonic aciden
dcterms.subjectuniconazoleen
dcterms.subjectnaphthaleneacetic aciddioscoreaen
dcterms.subjectnaphthaleneacetic aciden
dcterms.typeJournal Article

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