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Agronomic evaluation of cowpea cultivars developed for the West African Savannas

dc.contributor.authorKamara, A.Y.
dc.contributor.authorEwansiha, S.U.
dc.contributor.authorAjeigbe, Hakeem A.
dc.contributor.authorOmoigui, L.O.
dc.contributor.authorTofa, A.I.
dc.contributor.authorKarim, K.Y.
dc.date.accessioned2019-12-04T11:09:06Z
dc.date.available2019-12-04T11:09:06Z
dc.date.issued2017
dc.identifier.citationKamara, A.Y., Ewansiha, S., Ajeigbe, H., Omoigui, L., Tofa, A.I. & Karim, K.Y. (2017). Agronomic evaluation of cowpea cultivars developed for the West African Savannas. Legume Research 40(4): 669-676.
dc.identifier.issn0250-5371
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1976
dc.description.abstractThe goal of this research was to evaluate diverse cowpea genotypes developed over the past 4 decades in the Nigerian Sudan Savannas for their agronomic performance and to identify groups of cultivars with similar quantitative characters. Characterization would facilitate the efficient synthesis of breeding populations for further improvement of cowpea. Also superior genotypes with desirable characteristics could be identified and disseminated in the dry savannas of West Africa. Significant variations were observed in the agronomic characteristics of the cultivars in this study. Principal component analysis (PCA) and cluster analysis were performed on these genotypes and found that there were significant correlations among the variables measured. Modern cultivars outperformed the older ones and from the results of PCA, it was found that the most important variables for the classification of cowpea cultivars are high canopy, high seed weight, high total dry matter, high HI, and high grain and fodder yield. This suggests that these traits could be used in selection index for genetic improvement of cowpea. Cluster analysis resulted in 5 groups mostly corresponding to era of release except cluster I which contained cowpea cultivars from all eras. Two distinct groups in clusters IV and V were identified. Cultivars in cluster IV which were released in the 1990-2000 eras, had high grain and fodder yield. These cultivars could be evaluated on-farm for eventual release to farmers. They could also be used in breeding program for improvements in grain and fodder yield of cowpea. Cluster V contained two cultivars that distinctly had the highest fodder yield suggesting that they could be used to improve fodder yield of cowpea.
dc.format.extent669-676
dc.language.isoen
dc.subjectGrain Legumes
dc.subjectCluster Analysis
dc.subjectCowpeas
dc.subjectFodder Yield
dc.subjectYield
dc.subjectPca
dc.subjectCultivars
dc.subjectGenotypes
dc.subjectAgronomy
dc.titleAgronomic evaluation of cowpea cultivars developed for the West African Savannas
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpGrain Legumes
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversité du Bénin
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropics
cg.contributor.affiliationSierra Leone Agricultural Research Institute
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCowpea
cg.iitasubjectGenetic Improvement
cg.iitasubjectGrain Legumes
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.journalLegume Research
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid85437
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.18805/lr.v0i0.8410


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