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New sources and stability of resistance to aphids in cowpea germplasm across locations in Uganda

dc.contributor.authorKityo, R.
dc.contributor.authorOdoi, J.B.
dc.contributor.authorOzimati, A.
dc.contributor.authorDramadri, I.O.
dc.contributor.authorAgaba, R.
dc.contributor.authorOngom, P.O.
dc.contributor.authorNampala, P.
dc.contributor.authorEdema, R.
dc.contributor.authorKarungi, J.
dc.contributor.authorGibson, P.
dc.contributor.authorRubaihayo, P.R.
dc.date.accessioned2022-09-22T14:00:12Z
dc.date.available2022-09-22T14:00:12Z
dc.date.issued2021
dc.identifier.citationKityo, R., Odoi, J.B., Ozimati, A., Dramadri, I.O., Agaba, R., Ongom, P.O., ... & Rubaihayo, P.R. (2021). New sources and stability of resistance to aphids in cowpea germplasm across locations in Uganda. African Crop Science Journal, 29(2), 209-228.
dc.identifier.issn1021-9730
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7796
dc.description.abstractThe cowpea aphid (Aphis craccivora Koch) is an economically important pest, whose feeding effects cause stunting, delayed flower initiation and yield reduction in cowpea (Vigna unguiculata L. Walp). Host plant resistance offers an alternative for controlling aphids; while simultaneously reducing reliance on chemical pesticides. The objective of this study was to evaluate a multi-parent advanced generation inter-cross (MAGIC) population of cowpea against aphids, across cowpea growing regions in Uganda. The study was arranged in alpha lattice design, with two replicates in three locations over two seasons (2018B and 2019A). Results revealed significant effects (P<0.001) for the main treatment effects, genotype x location and location x season interaction for both infestation and damage. The genotype x season interaction was significant (P<0.01) for both aphid infestation and damage; while the three-way interaction was only significant (P<0.001) for aphid infestation, but not for damage. The study identified five new resistant and stable genotypes from the MAGIC panel, including MAGIC131, MAGIC-132, MAGIC149, MAGIC170 and MAGIC280; and one resistant parent, SUVITA-2. The study further revealed MAGIC-125, MAGIC-171, MAGIC153, MAGIC-333, MAGIC177, MAGIC-292, MAGIC282, MAGIC249, MAGIC162, SEC 4W * SEC 5T, NAROCOWPEA 4, MAGIC-204, MAGIC-039, MAGIC060, MAGIC-097, NAROCOWPEA 3, MAGIC-233, MAGIC090 and MU 9 to be moderately resistant and high yielding genotypes. The above genotypes are recommended for use in the cowpea breeding programme, to develop improved resistant lines against aphids in Uganda.
dc.description.sponsorshipCarnegie Corporation of New York
dc.format.extent209-228
dc.language.isoen
dc.subjectVigna unguiculata
dc.subjectClay soils
dc.subjectCowpeas
dc.subjectAphidoidea
dc.subjectPesticides
dc.subjectEconomics
dc.subjectPests
dc.subjectBreeding Programmes
dc.subjectGenotypes
dc.subjectGermplasm
dc.titleNew sources and stability of resistance to aphids in cowpea germplasm across locations in Uganda
dc.typeJournal Article
cg.contributor.affiliationMakerere University
cg.contributor.affiliationNational Crops Resources Research Institute
cg.contributor.affiliationUganda Christian University Mukono
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryUganda
cg.coverage.hubEastern Africa Hub
cg.identifier.bibtexciteidKITYO:2021
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCowpea
cg.iitasubjectDisease Control
cg.iitasubjectFarm Management
cg.iitasubjectFood Security
cg.iitasubjectGenetic Improvement
cg.iitasubjectGrain Legumes
cg.iitasubjectPests of Plants
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectSocioeconomy
cg.iitasubjectSoil Information
cg.journalAfrican Crop Science Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.4314/acsj.v29i2.3
cg.futureupdate.requiredNo
cg.identifier.issue2
cg.identifier.volume29
cg.contributor.acknowledgementsThis research was funded by Carnegie Corporation of New York under the Doctoral Research Grant (RU/2016/Carnegie/DRG/22) and the Post-Doctoral Fellowship Project (RU/ 2020/Post Doc/01) awarded through the Regional Universities Forum for Capacity Building in Agriculture (RUFORUM). Makerere University Regional Centre for Crop Improvement (MaRCCI) provided the germplasm and additional support for field activities.


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