Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield
Thirty-five cassava (Manihot esculenta Crantz) genotypes from the International Institute of Tropical Agriculture (IITA), germplasm collection were planted in May 1992 under natural disease infection conditions, at the IITA field plots at Ibadan, Nigeria. The genotypes were evaluated at monthly inte...
| Autores principales: | , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2000
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/92648 |
| _version_ | 1855538925814153216 |
|---|---|
| author | Fokunang, C.N. Akem, C. Dixon, A. Ikotun, T. |
| author_browse | Akem, C. Dixon, A. Fokunang, C.N. Ikotun, T. |
| author_facet | Fokunang, C.N. Akem, C. Dixon, A. Ikotun, T. |
| author_sort | Fokunang, C.N. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Thirty-five cassava (Manihot esculenta Crantz) genotypes from the International Institute of Tropical Agriculture (IITA), germplasm collection were planted in May 1992 under natural disease infection conditions, at the IITA field plots at Ibadan, Nigeria. The genotypes were evaluated at monthly intervals for six months, for incidence and severity of cassava anthracnose disease (CAD), cassava bacterial blight (CBB) and African cassava mosaic virus (ACMV). The effect of the pathogens on yield was also evaluated twelve months after planting (MAP). CAD, CBB and ACMV incidence and severity were significantly different (P<0.05) among the cassava genotypes at 3 and 6 months after planting. ACMV incidence and severity reached the maximum levels at 3 MAP while CAD and CBB had a low incidence and severity at that period but exhibited a high disease symptom expression at 6 MAP. Yield parameters (plant stand, tuber number, tuber weight and tuber dry matter) differed significantly (P<0.05) between the cassava genotypes. ACMV and CBB severity was negatively correlated with tuber number (r = −0.54 and r = −0.62 respectively). CAD severity was negatively correlated with tuber number (r = −0.46) and tuber weight (r = −0.63). Percentage dry matter was significantly correlated with ACMV severity (r = 0.71), CBB severity (r = 0.63) and CAD severity (r = 0.42). There was also a significant correlation between CBB and ACMD severity (r=0.46) and CBB and CAD severity (r=0.62). Tuber number and yield were significantly correlated (r=0.60), while% dry matter content and root rot showed a significant negative correlation (−0.42). |
| format | Journal Article |
| id | CGSpace92648 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2000 |
| publishDateRange | 2000 |
| publishDateSort | 2000 |
| record_format | dspace |
| spelling | CGSpace926482023-06-13T04:39:16Z Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield Fokunang, C.N. Akem, C. Dixon, A. Ikotun, T. anthracnose bacterial blight cassava germplasm mosaic virus Thirty-five cassava (Manihot esculenta Crantz) genotypes from the International Institute of Tropical Agriculture (IITA), germplasm collection were planted in May 1992 under natural disease infection conditions, at the IITA field plots at Ibadan, Nigeria. The genotypes were evaluated at monthly intervals for six months, for incidence and severity of cassava anthracnose disease (CAD), cassava bacterial blight (CBB) and African cassava mosaic virus (ACMV). The effect of the pathogens on yield was also evaluated twelve months after planting (MAP). CAD, CBB and ACMV incidence and severity were significantly different (P<0.05) among the cassava genotypes at 3 and 6 months after planting. ACMV incidence and severity reached the maximum levels at 3 MAP while CAD and CBB had a low incidence and severity at that period but exhibited a high disease symptom expression at 6 MAP. Yield parameters (plant stand, tuber number, tuber weight and tuber dry matter) differed significantly (P<0.05) between the cassava genotypes. ACMV and CBB severity was negatively correlated with tuber number (r = −0.54 and r = −0.62 respectively). CAD severity was negatively correlated with tuber number (r = −0.46) and tuber weight (r = −0.63). Percentage dry matter was significantly correlated with ACMV severity (r = 0.71), CBB severity (r = 0.63) and CAD severity (r = 0.42). There was also a significant correlation between CBB and ACMD severity (r=0.46) and CBB and CAD severity (r=0.62). Tuber number and yield were significantly correlated (r=0.60), while% dry matter content and root rot showed a significant negative correlation (−0.42). 2000 2018-05-17T09:02:58Z 2018-05-17T09:02:58Z Journal Article https://hdl.handle.net/10568/92648 en Limited Access Fokunang, C., Akem, C., Dixon, A. & Ikotun, T. (2000). Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield. Genetic Resources and Crop Evolution, 47(1), 63-71. |
| spellingShingle | anthracnose bacterial blight cassava germplasm mosaic virus Fokunang, C.N. Akem, C. Dixon, A. Ikotun, T. Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title | Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title_full | Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title_fullStr | Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title_full_unstemmed | Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title_short | Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| title_sort | evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield |
| topic | anthracnose bacterial blight cassava germplasm mosaic virus |
| url | https://hdl.handle.net/10568/92648 |
| work_keys_str_mv | AT fokunangcn evaluationofacassavagermplasmcollectionforreactiontothreemajordiseasesandtheeffectonyield AT akemc evaluationofacassavagermplasmcollectionforreactiontothreemajordiseasesandtheeffectonyield AT dixona evaluationofacassavagermplasmcollectionforreactiontothreemajordiseasesandtheeffectonyield AT ikotunt evaluationofacassavagermplasmcollectionforreactiontothreemajordiseasesandtheeffectonyield |