Abstract: The resistance to bacterial leaf blight of rice in eight pairs of cytoplasmic male sterile(CMS)lines(line A)and their maintainers(line B)was tested by inoculating 39 isolates(belong to 6 races)of Xanthomonas oryzae pv. oryzae during last two years. According to the difference of lesion length between line A and line B,it was discovered that Gang 46A, Zhenshan 97 A and You 1A were most susceptible to strain Ah28(race 4), and the ZS97A was more susceptible to Ah28 than ZS97B. Comparison of resistance of seven restorers and eight hybrid combinations(F₁)to different races showed that the resistance of hybrid combinations to the disease was not only controlled by nuclear genes, which derived from restorer and CMS line, but had close relation with compatibility of pathogenic race specificity.

Key words: Bacterial blight of rice, CMS, Maintainer, Hybrid rice, Resistance to Xanthomonas oryzae pv.oryzae

CLC Number: 

• S432.23