Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli
A Brazilian isolate of Fusarium oxysporum f. sp. phaseoli (F. o. f. sp. phaseoli) was used to determine the reactions of 66 lines of beans to the Fusarium yellows pathogen in greenhouse tests. The distal 1 cm of root tips of 1-wk-old seedlings grown in sterilized sand were removed, roots were dipped...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Scientific Societies
1987
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| Acceso en línea: | https://hdl.handle.net/10568/44009 |
| _version_ | 1855535129872564224 |
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| author | Pastor Corrales, Marcial A. Abawi, G.S. |
| author_browse | Abawi, G.S. Pastor Corrales, Marcial A. |
| author_facet | Pastor Corrales, Marcial A. Abawi, G.S. |
| author_sort | Pastor Corrales, Marcial A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A Brazilian isolate of Fusarium oxysporum f. sp. phaseoli (F. o. f. sp. phaseoli) was used to determine the reactions of 66 lines of beans to the Fusarium yellows pathogen in greenhouse tests. The distal 1 cm of root tips of 1-wk-old seedlings grown in sterilized sand were removed, roots were dipped in a spore suspension of F. o. f. sp. phaseoli for 5 min, and the seedlings were then transplanted into pots filled with pasturized soil. As the concentration of F. o. f. sp. phaseoli spores was increased from 0 to 1 × 107 / ml, incubation time to the first disease symptom was decreased and disease severity ratings (DSR) increased on the field-susceptible cultivar IPA 1. However, only slight disease symptoms occurred at a spore concentration of 1 × 107 on the line HF 465-63-1, known to show resistance under field conditions in Brazil. Severely infected plants became defoliated and often died within 2 3 wk. The dead stem and petiole tissues were covered with pink to orange spore masses. The extent and intensity of vascular discoloration was generally proportional to the overall foliar disease severity. Forty bean accessions evaluated with an inoculum concentration of 1 × 106 spores per milliliter were resistant (DSR 1 3), six were intermediate (DSR 3.1 6.0), and 20 were susceptible (DSR 6.1 9.0). Based on these results, an international nursery consisting of 48 entries of bean germ plasm for evaluation against F. o. f. sp. phaseoli has been formulated and is available for distribution from the Centro Internacional de Agricultura Tropical (CIAT). |
| format | Journal Article |
| id | CGSpace44009 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1987 |
| publishDateRange | 1987 |
| publishDateSort | 1987 |
| publisher | Scientific Societies |
| publisherStr | Scientific Societies |
| record_format | dspace |
| spelling | CGSpace440092024-05-01T08:18:53Z Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli Pastor Corrales, Marcial A. Abawi, G.S. phaseolus vulgaris germplasm resistance fusarium oxysporum cultivars diseases and pathogens mycoses pests germoplasma resistencia variedades A Brazilian isolate of Fusarium oxysporum f. sp. phaseoli (F. o. f. sp. phaseoli) was used to determine the reactions of 66 lines of beans to the Fusarium yellows pathogen in greenhouse tests. The distal 1 cm of root tips of 1-wk-old seedlings grown in sterilized sand were removed, roots were dipped in a spore suspension of F. o. f. sp. phaseoli for 5 min, and the seedlings were then transplanted into pots filled with pasturized soil. As the concentration of F. o. f. sp. phaseoli spores was increased from 0 to 1 × 107 / ml, incubation time to the first disease symptom was decreased and disease severity ratings (DSR) increased on the field-susceptible cultivar IPA 1. However, only slight disease symptoms occurred at a spore concentration of 1 × 107 on the line HF 465-63-1, known to show resistance under field conditions in Brazil. Severely infected plants became defoliated and often died within 2 3 wk. The dead stem and petiole tissues were covered with pink to orange spore masses. The extent and intensity of vascular discoloration was generally proportional to the overall foliar disease severity. Forty bean accessions evaluated with an inoculum concentration of 1 × 106 spores per milliliter were resistant (DSR 1 3), six were intermediate (DSR 3.1 6.0), and 20 were susceptible (DSR 6.1 9.0). Based on these results, an international nursery consisting of 48 entries of bean germ plasm for evaluation against F. o. f. sp. phaseoli has been formulated and is available for distribution from the Centro Internacional de Agricultura Tropical (CIAT). 1987 2014-10-02T08:33:05Z 2014-10-02T08:33:05Z Journal Article https://hdl.handle.net/10568/44009 en Open Access Scientific Societies |
| spellingShingle | phaseolus vulgaris germplasm resistance fusarium oxysporum cultivars diseases and pathogens mycoses pests germoplasma resistencia variedades Pastor Corrales, Marcial A. Abawi, G.S. Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title | Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title_full | Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title_fullStr | Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title_full_unstemmed | Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title_short | Reactions of selected bean germ plasm to infection by Fusarium oxysporum f. sp. phaseoli |
| title_sort | reactions of selected bean germ plasm to infection by fusarium oxysporum f sp phaseoli |
| topic | phaseolus vulgaris germplasm resistance fusarium oxysporum cultivars diseases and pathogens mycoses pests germoplasma resistencia variedades |
| url | https://hdl.handle.net/10568/44009 |
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