Quantitative resistance of rice to blast disease
Eighteen rice cultivars used for differentiating physiologic races of Pyricularia oryzae in the Philippines were repeatedly exposed in the blast nursery, and seven of them artificially inoculated with 40 single-spore isolates. The number of lesions that formed on individual cultivars was negatively...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
1982
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/43996 |
| _version_ | 1855527523101704192 |
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| author | Sang Won Ahn Ou, SH |
| author_browse | Ou, SH Sang Won Ahn |
| author_facet | Sang Won Ahn Ou, SH |
| author_sort | Sang Won Ahn |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Eighteen rice cultivars used for differentiating physiologic races of Pyricularia oryzae in the Philippines were repeatedly exposed in the blast nursery, and seven of them artificially inoculated with 40 single-spore isolates. The number of lesions that formed on individual cultivars was negatively correlated with the percentage of resistant reactions of each cultivar to 242 races of P. oryzae in the Philippines, as well as to the 69 races identified during the tests. Cultivars resistant to most races had very few lesions. Accumulation of many vertical or specific resistance genes in a cultivar against many specific races of P. oryzae appears to confer horizontal or general resistance to blast. Comparison of 40 single-spore isolates for pathogenicity indicated that the spore populations of the majority of the isolates were heterogeneous, consisting of many different pathogenic races, very much like that in a blast nursery. |
| format | Journal Article |
| id | CGSpace43996 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1982 |
| publishDateRange | 1982 |
| publishDateSort | 1982 |
| record_format | dspace |
| spelling | CGSpace439962023-02-15T05:16:06Z Quantitative resistance of rice to blast disease Sang Won Ahn Ou, SH oryza sativa disease resistance pyricularia oryzae resistencia a la enfermedad Eighteen rice cultivars used for differentiating physiologic races of Pyricularia oryzae in the Philippines were repeatedly exposed in the blast nursery, and seven of them artificially inoculated with 40 single-spore isolates. The number of lesions that formed on individual cultivars was negatively correlated with the percentage of resistant reactions of each cultivar to 242 races of P. oryzae in the Philippines, as well as to the 69 races identified during the tests. Cultivars resistant to most races had very few lesions. Accumulation of many vertical or specific resistance genes in a cultivar against many specific races of P. oryzae appears to confer horizontal or general resistance to blast. Comparison of 40 single-spore isolates for pathogenicity indicated that the spore populations of the majority of the isolates were heterogeneous, consisting of many different pathogenic races, very much like that in a blast nursery. 1982 2014-10-02T08:33:04Z 2014-10-02T08:33:04Z Journal Article https://hdl.handle.net/10568/43996 en Open Access |
| spellingShingle | oryza sativa disease resistance pyricularia oryzae resistencia a la enfermedad Sang Won Ahn Ou, SH Quantitative resistance of rice to blast disease |
| title | Quantitative resistance of rice to blast disease |
| title_full | Quantitative resistance of rice to blast disease |
| title_fullStr | Quantitative resistance of rice to blast disease |
| title_full_unstemmed | Quantitative resistance of rice to blast disease |
| title_short | Quantitative resistance of rice to blast disease |
| title_sort | quantitative resistance of rice to blast disease |
| topic | oryza sativa disease resistance pyricularia oryzae resistencia a la enfermedad |
| url | https://hdl.handle.net/10568/43996 |
| work_keys_str_mv | AT sangwonahn quantitativeresistanceofricetoblastdisease AT oush quantitativeresistanceofricetoblastdisease |