Agronomic evaluation of cowpea cultivars developed for the West African Savannas
The 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...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Agricultural Research Communication Center
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/83014 |
| _version_ | 1855516716719669248 |
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| author | Kamara, A.Y. Ewansiha, S.U. Ajeigbe, Hakeem A. Omoigui, L.O. Tofa, A.I. Karim, K.Y. |
| author_browse | Ajeigbe, Hakeem A. Ewansiha, S.U. Kamara, A.Y. Karim, K.Y. Omoigui, L.O. Tofa, A.I. |
| author_facet | Kamara, A.Y. Ewansiha, S.U. Ajeigbe, Hakeem A. Omoigui, L.O. Tofa, A.I. Karim, K.Y. |
| author_sort | Kamara, A.Y. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The 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. |
| format | Journal Article |
| id | CGSpace83014 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Agricultural Research Communication Center |
| publisherStr | Agricultural Research Communication Center |
| record_format | dspace |
| spelling | CGSpace830142023-12-08T19:25:22Z Agronomic evaluation of cowpea cultivars developed for the West African Savannas Kamara, A.Y. Ewansiha, S.U. Ajeigbe, Hakeem A. Omoigui, L.O. Tofa, A.I. Karim, K.Y. grain legumes cluster analysis cowpeas fodder yield yield pca cultivars genotypes agronomy The 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. 2017 2017-08-07T10:04:25Z 2017-08-07T10:04:25Z Journal Article https://hdl.handle.net/10568/83014 en Open Access Agricultural Research Communication Center Kamara, 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. |
| spellingShingle | grain legumes cluster analysis cowpeas fodder yield yield pca cultivars genotypes agronomy Kamara, A.Y. Ewansiha, S.U. Ajeigbe, Hakeem A. Omoigui, L.O. Tofa, A.I. Karim, K.Y. Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title | Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title_full | Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title_fullStr | Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title_full_unstemmed | Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title_short | Agronomic evaluation of cowpea cultivars developed for the West African Savannas |
| title_sort | agronomic evaluation of cowpea cultivars developed for the west african savannas |
| topic | grain legumes cluster analysis cowpeas fodder yield yield pca cultivars genotypes agronomy |
| url | https://hdl.handle.net/10568/83014 |
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