Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas
The average productivity of cowpea in the existing traditional systems is low due to a complex of biotic and abiotic stresses. The biotic factors include insect pests, parasitic plants, and viral, fungal and bacterial diseases. Concerted efforts are being made to develop improved cowpea varieties wi...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2008
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/90808 |
| _version_ | 1855525851047657472 |
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| author | Ajeigbe, Hakeem A. Singh, B.B. Emechebe, A.M. |
| author_browse | Ajeigbe, Hakeem A. Emechebe, A.M. Singh, B.B. |
| author_facet | Ajeigbe, Hakeem A. Singh, B.B. Emechebe, A.M. |
| author_sort | Ajeigbe, Hakeem A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The average productivity of cowpea in the existing traditional systems is low due to a complex of biotic
and abiotic stresses. The biotic factors include insect pests, parasitic plants, and viral, fungal and
bacterial diseases. Concerted efforts are being made to develop improved cowpea varieties with
combined resistance to these constraints. Twenty five cowpea lines including two local land-races were
grown at three locations in the first year (2002) and at six locations in the second year (2003) in Nigeria
and Niger for field screening for resistance to Bacterial blight. Many of the improved varieties had
significantly higher grain and fodder yields than the local checks. There was genotype x environment
interactions for grain and fodder yields. About 44% of the varieties tested were resistant to bacterial
blight while 20% showed moderate resistance and others were susceptible. Bacterial blight was more
important in the Sahel, and several improved cowpea breeding lines, IT98K-506-1, IT97K-1113-7, IT97K-
1069-6, IT97K-1092-2, IT97K-1069-5, IT98K-131-2 and IT97K-568-18 produced higher grain and fodder
yields than the other varieties and showed combined resistance to the disease. These varieties should
therefore be evaluated on-farm for onward release to farmers where there seed types meet the farmers
preferred seed type other wise they can be used as parent lines as source of important genes for
resistant to the diseases and high grain and fodder yields. |
| format | Journal Article |
| id | CGSpace90808 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| record_format | dspace |
| spelling | CGSpace908082023-06-12T13:42:26Z Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas Ajeigbe, Hakeem A. Singh, B.B. Emechebe, A.M. bacterial blight cowpeas virus striga yield west africa savanna biotic and abiotic factors pathogen The average productivity of cowpea in the existing traditional systems is low due to a complex of biotic and abiotic stresses. The biotic factors include insect pests, parasitic plants, and viral, fungal and bacterial diseases. Concerted efforts are being made to develop improved cowpea varieties with combined resistance to these constraints. Twenty five cowpea lines including two local land-races were grown at three locations in the first year (2002) and at six locations in the second year (2003) in Nigeria and Niger for field screening for resistance to Bacterial blight. Many of the improved varieties had significantly higher grain and fodder yields than the local checks. There was genotype x environment interactions for grain and fodder yields. About 44% of the varieties tested were resistant to bacterial blight while 20% showed moderate resistance and others were susceptible. Bacterial blight was more important in the Sahel, and several improved cowpea breeding lines, IT98K-506-1, IT97K-1113-7, IT97K- 1069-6, IT97K-1092-2, IT97K-1069-5, IT98K-131-2 and IT97K-568-18 produced higher grain and fodder yields than the other varieties and showed combined resistance to the disease. These varieties should therefore be evaluated on-farm for onward release to farmers where there seed types meet the farmers preferred seed type other wise they can be used as parent lines as source of important genes for resistant to the diseases and high grain and fodder yields. 2008-10 2018-02-06T12:14:51Z 2018-02-06T12:14:51Z Journal Article https://hdl.handle.net/10568/90808 en Open Access Ajeigbe, H.A., Singh, B.B. & Emechebe, A.M. (2008). Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African Savannas. African Journal of Biotechnology, 7(20), 3563-3568. |
| spellingShingle | bacterial blight cowpeas virus striga yield west africa savanna biotic and abiotic factors pathogen Ajeigbe, Hakeem A. Singh, B.B. Emechebe, A.M. Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title | Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title_full | Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title_fullStr | Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title_full_unstemmed | Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title_short | Field evaluation of improved cowpea lines for resistance to bacterial blight, virus and striga under natural infestation in the West African savannas |
| title_sort | field evaluation of improved cowpea lines for resistance to bacterial blight virus and striga under natural infestation in the west african savannas |
| topic | bacterial blight cowpeas virus striga yield west africa savanna biotic and abiotic factors pathogen |
| url | https://hdl.handle.net/10568/90808 |
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