水稻白叶枯病和细条病稻兼抗资源筛选及兼抗基因分析.

285 rice lines were used to screen resources and get both resistance to bacterial blight and bacterial leaf streak by artificial inoculation and molecular marker analysis in present study. The results indicated 9 and 7 lines were resistant to strong virulent V type strain of bacterial blight at resistant level and moderate level respectively. For JZ-8 strain of bacterial leaf streak, 2 lines were highly resistant, 31 lines were resistant, and 50 lines were moderately resistant. For LZ-4 strain of bacterial leaf streak, 16 lines were highly resistant, 68 lines were resistant, and 100 lines were moderately resistant. From all the 285 lines, 9 lines were resistant to bacterial blight and at least one of the strains of bacterial leaf streak above moderate resistance level. The 9 lines with resistance to both bacterial blight and bacterial leaf streak showed good yield-related agronomical traits. Two of these lines were found to carry xa5 that mediated resistance to both bacterial blight and bacterial leaf streak. Other seven of these lines were not found to cany xa5 that belong to another type of resistance. There was no significant correlation between the resistance of bacterial blight and bacterial leaf streak. There was highly significant correlation between the resistance of JZ-8 and LZ-4 of bacterial leaf streak. [ABSTRACT FROM AUTHOR]