Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield
Use of genetic resistance is the most practical and economic way to manage major diseases of yams. In a search for sources of resistance, 40 water yam (Dioscorea alata L.) accessions from Benin, Ghana, Nigeria and Puerto Rico were screened under natural disease infection conditions in Ibadan, Nigeri...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2007
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/92213 |
| _version_ | 1855531123799490560 |
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| author | Egesi, Chiedozie N. Odu, B. Ogunyemi, S. Asiedu, Robert Hughes, J. |
| author_browse | Asiedu, Robert Egesi, Chiedozie N. Hughes, J. Odu, B. Ogunyemi, S. |
| author_facet | Egesi, Chiedozie N. Odu, B. Ogunyemi, S. Asiedu, Robert Hughes, J. |
| author_sort | Egesi, Chiedozie N. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Use of genetic resistance is the most practical and economic way to manage major diseases of yams. In a search for sources of resistance, 40 water yam (Dioscorea alata L.) accessions from Benin, Ghana, Nigeria and Puerto Rico were screened under natural disease infection conditions in Ibadan, Nigeria. The accessions were evaluated at 1, 3 and 6 months after planting (MAP) for severity of yam anthracnose and viral diseases. The effect of the pathogens on yield was also evaluated at harvest 9 MAP. There were significant differences (P < 0.001) between accessions for severities of anthracnose and viral diseases. Eight (20%) of them had lower anthracnose area under disease progress curves (AUDPC) values than the resistant check while 10 (25%) had AUDPC values below the trial mean. There were significant variations (P < 0.001) in yield components among the accessions. There was significant negative correlation of anthracnose severity with fresh tuber yield (r = −0.51) and with number of tubers per plot (r = −0.40). Similarly, significant negative correlations were observed of virus disease severity with fresh tuber yield (r = −0.78) and number of tubers per plot (r = −0.65). Linear regression models also showed that the fresh yield had significant negative relationships with anthracnose (R2 = 0.26) and viral (R2 = 0.62) diseases. The accessions identified as resistant constitute a valuable resource for breeding of resistant germplasm. |
| format | Journal Article |
| id | CGSpace92213 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace922132024-05-15T05:11:52Z Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield Egesi, Chiedozie N. Odu, B. Ogunyemi, S. Asiedu, Robert Hughes, J. yams anthracnose virus disease fresh tuber yield germplasm yam mosaic virus potyvirus Use of genetic resistance is the most practical and economic way to manage major diseases of yams. In a search for sources of resistance, 40 water yam (Dioscorea alata L.) accessions from Benin, Ghana, Nigeria and Puerto Rico were screened under natural disease infection conditions in Ibadan, Nigeria. The accessions were evaluated at 1, 3 and 6 months after planting (MAP) for severity of yam anthracnose and viral diseases. The effect of the pathogens on yield was also evaluated at harvest 9 MAP. There were significant differences (P < 0.001) between accessions for severities of anthracnose and viral diseases. Eight (20%) of them had lower anthracnose area under disease progress curves (AUDPC) values than the resistant check while 10 (25%) had AUDPC values below the trial mean. There were significant variations (P < 0.001) in yield components among the accessions. There was significant negative correlation of anthracnose severity with fresh tuber yield (r = −0.51) and with number of tubers per plot (r = −0.40). Similarly, significant negative correlations were observed of virus disease severity with fresh tuber yield (r = −0.78) and number of tubers per plot (r = −0.65). Linear regression models also showed that the fresh yield had significant negative relationships with anthracnose (R2 = 0.26) and viral (R2 = 0.62) diseases. The accessions identified as resistant constitute a valuable resource for breeding of resistant germplasm. 2007-09 2018-04-24T08:40:15Z 2018-04-24T08:40:15Z Journal Article https://hdl.handle.net/10568/92213 en Limited Access Wiley Egesi, C.N., Odu, B., Ogunyemi, S., Asiedu, R. & Hughes, J. (2007). Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield. Journal of Phytopathology, 155(9), 536-543. |
| spellingShingle | yams anthracnose virus disease fresh tuber yield germplasm yam mosaic virus potyvirus Egesi, Chiedozie N. Odu, B. Ogunyemi, S. Asiedu, Robert Hughes, J. Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title | Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title_full | Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title_fullStr | Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title_full_unstemmed | Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title_short | Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| title_sort | evaluation of water yam dioscorea alata l germplasm for reaction to yam anthracnose and virus diseases and their effect on yield |
| topic | yams anthracnose virus disease fresh tuber yield germplasm yam mosaic virus potyvirus |
| url | https://hdl.handle.net/10568/92213 |
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