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Evaluation of the American yam bean (Pachyrhizus spp.) for storage root yield across varying eco-geographic conditions in Uganda

dc.contributor.authorAndiku, C.
dc.contributor.authorTukamuhabwa, P.
dc.contributor.authorSsebuliba, J.M.
dc.contributor.authorTalwana, H.
dc.contributor.authorTumwegamire, S.
dc.contributor.authorGruneberg, W.J.
dc.date.accessioned2020-07-07T10:40:05Z
dc.date.available2020-07-07T10:40:05Z
dc.date.issued2019
dc.identifier.citationAndiku, C., Tukamuhabwa, P., Ssebuliba, J.M., Talwana, H., Tumwegamire, S. & Gruneberg, W.J. (2019). Evaluation of the American yam bean (Pachyrhizus spp.) for storage root yield across varying eco-geographic conditions in Uganda. Journal of Agricultural Science, 11(8), 100-112.
dc.identifier.issn1916-9752
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6899
dc.description.abstractThe American yam bean (Pachyrhizus spp.) is a legume crop that is exclusively used for its storage roots. The seeds are inedible due to presence of toxic rotenone. It produces high storage root yields comparable of major root crops like cassava or sweetpotato. And flower pruning more than doubles its root yield performance. Using twenty five yam bean accessions, the current study aimed to determine root yield stability and adaptability, and presence of yam bean production mega environments in Uganda. Trials were planted at three stations, Namulonge, Serere, and Kachwekano during two consecutive seasons of 2011. Fresh storage root yields were significantly different (p < 0.05) across locations with the ideal location being Namulonge (fresh storage root yield of 10.1 t ha-1), followed by Serere (8.0 t ha-1), and Kachwekano (3.1 t ha-1). Results of AMMI analysis indicated the presence of genotype-by-environment interaction for fresh storage root yield. Through AMMI estimates and GGE visual assessment, genotype 209017 was the highest yielding with mean yield of 20.7 t ha-1. Genotype 209018 with mean yield of 15.5 t ha-1 was the most stable and adapted accession in the entire discriminating environment in Uganda. From the environmental focusing plot, the six environments were grouped into two putative mega environments for yam bean production.
dc.format.extent100-112
dc.language.isoen
dc.subjectPachyrhizus
dc.subjectLegumes
dc.subjectYields
dc.subjectStability
dc.subjectUganda
dc.subjectAdaptability
dc.subjectYam Bean
dc.subjectGenotype Environment Interaction
dc.titleEvaluation of the American yam bean (Pachyrhizus spp.) for storage root yield across varying eco-geographic conditions in Uganda
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationNational Semi Arid Resources Research Institute, Uganda
cg.contributor.affiliationMakerere University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInternational Potato Centre
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryUganda
cg.coverage.hubCentral Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidANDIKU:2019
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCrop Systems
cg.iitasubjectGrain Legumes
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalJournal of Agricultural Science
cg.notesPublished online: 15 Jun 2019
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.5539/jas.v11n8p100
cg.iitaauthor.identifierSilver Tumwegamire: 0000-0003-2820-6337
cg.iitaauthor.identifierWolfgang Gruneberg: 0000-0002-8306-6704


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