Resistance to the Weevils Cylas puncticollis and Cylas brunneus Conferred by Sweetpotato Root Surface Compounds

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dc.contributor.authorAnyanga, M. Otema
dc.contributor.authorMuyinza, Harriet
dc.contributor.authorTalwana, Herbert
dc.contributor.authorHall, David R.
dc.contributor.authorFarman, Dudley I.
dc.contributor.authorSsemakula, Gorrettie N.
dc.contributor.authorMwanga, Robert O. M.
dc.contributor.authorStevenson, Philip C.
dc.date.accessioned2022-06-01T05:40:44Z
dc.date.available2022-06-01T05:40:44Z
dc.date.issued2013
dc.description.abstractSeven resistant varieties of sweetpotato were compared with three susceptible varieties in field trials and laboratory bioassays and showed that resistance was an active process rather than an escape mechanism, as field resistant varieties also had reduced root damage and oviposition compared with susceptible varieties in the laboratory. Liquid chromatography−mass spectrometry (LC−MS) of root surface and epidermal extracts showed significant variation in the concentration of hexadecyl, heptadecyl, octadecyl, and quinic acid esters of caffeic and coumaric acid, with higher concentrations correlated with resistance. All compounds were synthesized to enable their positive identification. Octadecyl coumarate and octadecyl caffeate applied to the surface of susceptible varieties in laboratory bioassays reduced feeding and oviposition, as observed on roots of resistant varieties, and therefore are implicated in weevil resistance. Segregating populations from breeding programs can use these compounds to identify trait loci for resistance and enable the development of resistant varietiesen_US
dc.identifier.citationAnyanga, M. O., Muyinza, H., Talwana, H., Hall, D. R., Farman, D. I., Ssemakula, G. N., ... & Stevenson, P. C. (2013). Resistance to the weevils Cylas puncticollis and Cylas brunneus conferred by sweetpotato root surface compounds. Journal of Agricultural and Food Chemistry, 61(34), 8141-8147. dx.doi.org/10.1021/jf4024992en_US
dc.identifier.uridx.doi.org/10.1021/jf4024992
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/3640
dc.language.isoenen_US
dc.publisherJournal of Agricultural and Food Chemistryen_US
dc.subjectHydroxycinnamic acid estersen_US
dc.subjectResistanceen_US
dc.subjectSweetpotato varietiesen_US
dc.subjectWeevilsen_US
dc.titleResistance to the Weevils Cylas puncticollis and Cylas brunneus Conferred by Sweetpotato Root Surface Compoundsen_US
dc.typeArticleen_US
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