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

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dc.creatorNdirigwe, J.
dc.creatorRubaihayo, P.R.
dc.creatorTukamuhabwe, Phineas
dc.creatorAgaba, R.
dc.creatorRukundo, P.
dc.creatorMwanga, Robert O.M.
dc.creatorTumwegamire, Silver
dc.creatorKamarirwa, V.
dc.creatorKayinamura, E.
dc.creatorGrüneberg, W.J.
dc.date2017-09
dc.date2017-12-13T10:16:27Z
dc.date2017-12-13T10:16:27Z
dc.date.accessioned2026-06-27T17:58:46Z
dc.descriptionThe 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.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/89724
dc.identifier.urihttp://hdl.handle.net/123456789/151320
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceNdirigwe, 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.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

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