| 摘要 |
FIELD: agriculture. ^ SUBSTANCE: first plant or its part is exposed to infection dose of ToTV. Then plants with no or slight symptoms of disease are identified. ^ EFFECT: plants identified in such a manner as resistant to virus are used as donor ones to cross with recipient plants, and plants resistant to ToTV are chosen from descendant plants. ^ 8 cl, 7 dwg, 5 tbl, 2 ex |
