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Evaluation of performance of introduced yam bean (Pachyrhizus spp.) in three agro-ecological zones of Rwanda

dc.contributor.authorNdirigwe, J.
dc.contributor.authorRubaihayo, P.R.
dc.contributor.authorTukamuhabwa, P.
dc.contributor.authorAgaba, R.
dc.contributor.authorRukundo, P.
dc.contributor.authorMwanga, R.O.M.
dc.contributor.authorTumwegamire, S.
dc.contributor.authorKamarirwa, V.
dc.contributor.authorKayinamura, E.
dc.contributor.authorWolfgang, J.G.
dc.date.accessioned2019-12-04T11:11:25Z
dc.date.available2019-12-04T11:11:25Z
dc.date.issued2017-09
dc.identifier.citationNdirigwe, J., Rubaihayo, P., Tukamuhabwa, P., Agaba, R., Rukundo, P., Mwanga, O.M.R., ... & Wolfgang, J.G. (2017). Evaluation of performance of introduced yam bean (Pachyrhizus spp.) in three agro-ecological zones of Rwanda. Tropical Plant Biology, 10(2-3),1-13.
dc.identifier.issn1935-9756
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2426
dc.descriptionArticle purchased; Published online: 25 May 2017
dc.description.abstractThe yam bean (Pachyrizhus spp) was recently introduced as a root crop with high-yield potential, considerable protein and micro-nutrient concentration to investigate its potential for food production in Rwanda. Except for Chuin types (Pachyrizhus tuberosus) which have high storage root dry matter (RDM) (26 to 36%), most accessions are consumed raw and are reported to have low RDM. The present study aimed to evaluate and identify adapted high yielding yam bean accessions in major agro-ecological zones of Rwanda. Field experiments with 22 accessions were conducted in 2012 at three research sites representing the major agro-ecologies of Rwanda. Strict reproductive pruning was followed to enhance fresh storage root yields. Across locations, ANOVA indicated highly significant differences (p < 0.01) for genotypes (G), locations (L), seasons (S) and G x L effects for storage root yield, vine yield and harvest index and accounted for 21.88%, 43.41%, 1.43% and 13.25% of the treatment sum of squares, respectively. The GGE bi-plot revealed that EC209018 is high yielding but unstable. However, genotypes, AC209034, AC209035 and EC209046, were outstanding in terms of adaptation and relative stability across the 3 locations, suggesting consistent root yields irrespective of location and environmental conditions. The GGE scatter plot showed that all genotypes formed one mega-environment for storage root yield (Karama, Musanze and Rubona) and two mega-environments for biomass yield (Karama and Rubona as one mega-environment and Musanze the second one). This study revealed that Karama is the most suitable environment for evaluation and selection of yam bean for yield components in Rwanda.
dc.description.sponsorshipDirectorate-General for Development Cooperation and Humanitarian Aid, Belgium
dc.format.extent97-109
dc.language.isoen
dc.subjectYams
dc.subjectYam Bean
dc.subjectGenotypes
dc.subjectPachyrizhus
dc.subjectGxe
dc.subjectHigh Storage Roots Yield
dc.subjectHarvest Index
dc.subjectGge Bi-Plot
dc.titleEvaluation of performance of introduced yam bean (Pachyrhizus spp.) in three agro-ecological zones of Rwanda
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationMakerere University
cg.contributor.affiliationRwanda Agriculture Board
cg.contributor.affiliationInternational Potato Center
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationNational University of Rwanda
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryRwanda
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectYam
cg.journalTropical Plant Biology
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid92531
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.1007/s12042-017-9188-5


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