Chemical basis for resistance in sweetpotato Ipomoea batatas to the sweetpotato weevil Cylas puncticollis

Simple item page
dc.contributor.authorStevenson, Philip C.
dc.contributor.authorMuyinza, Harriet
dc.contributor.authorHall, David R.
dc.contributor.authorPorter, Elaine A.
dc.contributor.authorFarman, Dudley I.
dc.contributor.authorTalwana, Herbert
dc.contributor.authorMwanga, Robert O. M.
dc.date.accessioned2022-05-31T08:29:19Z
dc.date.available2022-05-31T08:29:19Z
dc.date.issued2009
dc.description.abstractThe aim of this work was to determine the basis of resistance in a sub-Saharan sweetpotato variety, New Kawogo, to the African sweetpotato weevil Cylas puncticollis. This insect feeds on the roots, reducing quality and yield, and is the most important production constraint of sweetpotato in Africa. Laboratory bioassays were designed to determine how the performance of weevils differed on susceptible and resistant roots. Subsequently, liquid chromatography-mass spectrometry (LC-MS) analysis of the root surface and root latex identified quantitative and qualitative differences in the chemical profiles with higher levels of octadecyl and hexadecyl esters of hydroxycinnamic acids reported in the resistant variety. The compounds were synthesized to confirm their identity and incorporated into artificial diets for bioassays on C. puncticollis. High levels of mortality and developmental inhibition were recorded for larvae feeding on treated diets, and the effect was dose-dependent. Thus, in contrast to previous work on resistant African sweetpotato cultivars, resistance in New Kawogo is not only active, but is quantifiable and manageable for breeding. Work is underway to determine what effect these compounds have on the weevils at a molecular level. The inheritance of the root latex esters will be studied in new crosses and mapped in new populations using quantitative trait loci (QTLs) that are currently being developed.en_US
dc.identifier.citationStevenson, PC, Muyinza, H., Hall, DR, Porter, EA, Farman, DI, Talwana, H., & Mwanga, RO (2009). Chemical basis for resistance in sweetpotato Ipomoea batatas to the sweetpotato weevil Cylas puncticollis. Pure and Applied Chemistry , 81 (1), 141-151. 10.1351/PAC-CON-08-02-10en_US
dc.identifier.other10.1351/PAC-CON-08-02-10
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/3630
dc.language.isoenen_US
dc.publisherPure and Applied Chemistryen_US
dc.subjectHexadecyl estersen_US
dc.subjectOctadecyl estersen_US
dc.subjectHydroxycinnamic aciden_US
dc.subjectCaffeic acid esteren_US
dc.subjectCoumaricen_US
dc.subjectRoot latexen_US
dc.subjectIpomoea batatasen_US
dc.subjectCylas brunneusen_US
dc.subjectResistanceen_US
dc.titleChemical basis for resistance in sweetpotato Ipomoea batatas to the sweetpotato weevil Cylas puncticollisen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Chemical basis for resistance in sweetpotato.pdf
Size:
277.17 KB
Format:
Adobe Portable Document Format
Description:
Article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Agricultural and Veterinary Sciences