Harnessing genotype-by-environment interaction to determine adaptability of advanced cowpea lines to multiple environments in Uganda

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dc.contributor.authorAbiriga, Francis
dc.contributor.authorOngom, Patrick O.
dc.contributor.authorRubaihayo, Patrick R.
dc.contributor.authorEdema, Richard
dc.contributor.authorGibson, Paul T.
dc.contributor.authorDramadri, Isaac
dc.contributor.authorOrawu, Martin
dc.date.accessioned2022-05-26T18:42:33Z
dc.date.available2022-05-26T18:42:33Z
dc.date.issued2020
dc.description.abstractThis study was conducted to determine the yield stability of advanced cowpea lines in diverse agroecological zones of Uganda in order to facilitate documentation requirements for national performance trials (NPT). Thirty cowpea genotypes were evaluated against six checks in three localities, over three growing seasons, making a total of 9 unique environments. The trials were laid in a 6x6 alpha lattice design with three replications and grain yield was the principal trait measured. Single-site and multilocation data were summarized using analysis of variance. Further analysis of stability was visualized using the genotype and genotype by environment interaction (GGE) biplot and the additive main effect and multiplicative interaction (AMMI) models. ANOVA depicted highly significant differences among the genotypes, locations, seasons and GEI for grain yield. Based on AMMI analysis, environmental effect accounted for the most variation (84.7%) in the phenotype followed by GE (9.45%) and genotypes (4.45%), alluding to the complex inheritance of grain yield in cowpea. The polygon view and the average environment coordination view of the GGE biplot revealed Ayiyi as the wining genotype in the major mega environment and the most stable and high yielding across environments respectively. The genotypes Ayiyi, WC64 and ALEGIxACC2 yielded higher than the checks and were very stable. The other genotypes G36 (WC 36), G3 (ACC12xSECOW3B), G32 (WC16), and G14 (MU9) did not outperform the checks but displayed high yield stability and the mean yields were above the overall average. These genotypes were considered desirable for advancement to National Performance Trial for potential release as new improved cowpea cultivars.en_US
dc.identifier.citationAbiriga, F., Ongom, PO, Rubaihayo, PR, Edema, R., Gibson, PT, Dramadri, I., & Orawu, M. (2020). Harnessing genotype-by-environment interaction to determine adaptability of advanced cowpea lines to multiple environments in Uganda. Journal of Plant Breeding and Crop Science , 12 (2), 131-145. DOI: 10.5897/JPBCS2020.0891en_US
dc.identifier.other10.5897/JPBCS2020.0891
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/3508
dc.language.isoenen_US
dc.publisherJournal of Plant Breeding and Crop Scienceen_US
dc.subjectCowpea (Vigna unguiculata L. Walp)en_US
dc.subjectAdditive main effect and multiplicative interaction (AMMI)en_US
dc.subjectGenotype and genotype by environment interaction (GGE)en_US
dc.subjectStabilityen_US
dc.subjectGrain yielden_US
dc.titleHarnessing genotype-by-environment interaction to determine adaptability of advanced cowpea lines to multiple environments in Ugandaen_US
dc.typeArticleen_US
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