外引野稻对白叶枯病的抗性鉴定

鉴定结果表明：野稻不同种对白叶枯病抗性的差异明显不同。同一个种不同植株编号对同一菌株，甚至同一植株编号对同属于致病型Ⅳ的不同菌株抗性的差异也不同。在供试样本较多的野稻中，长药野稻、药用野稻、小粒野稻和短叶舌野稻抗性强的编号所占比例较大，斑点野稻、紧穗野稻、尼瓦拉野稻和澳洲野稻次之，重颖野稻和高秆野稻抗性强的编号则尚未发现。本鉴定共计筛选出高抗和抗的植株编号３５个，其中含供试植株仅唯一样本的疣粒野稻

EVALUATION OF WILD RICE SPECIES COLLECTED FROM FOREIGN COUNTRIES FOR RESISTANCE TO BACTERIAL BLIGHT

Seventy-one accessions of 14 species of wild rice collected from foreign countries were tested for the resistance to bacterial blight caused by Xanthomonas oryzae pv. oryzae by clipping method. The results showed that the resistance of wild rice markedly varied between, different species or accessions of same species. Of all accessions of wild rices tested, 35 accessions of 9 species were highly resistant or moderately resistant. They were Oryza longistaminata including accessions I82-5, 82-6, 82-10, 82-45, 82-46, 82-47, 82-50, 82-51-2, 82-53, 82-55, 82-57, and 82-66, O. officinalis 182-11 and 82-72, O. minuta I82-13 and 82-73, O. breviligulata I82-63, O. meyeriana I82-89, O. punctata I82-16, O. eichingeri I82-25, O. redleyi I82-24, O. rufipogon I82-2, etc. .