水稻白叶枯病是主要的稻作病害之一。相关研究表明，疣粒野生稻高抗白叶枯病，甚至对白叶枯病免疫。为了探索病原菌发生变异情况下，疣粒野生稻抗性的变化情况，本研究利用收集的24个国内外白叶枯病菌系，采用孕穗期剪叶接种的方法，鉴定并评价了36份云南疣粒野生稻的抗病性。结果表明，参试的大部分材料表现为典型的白叶枯病症状，病斑为褐色，病斑长度0.00~0.30 cm；供试材料整体抗性水平较好，44.44%的材料对24个菌株抗性达到了高抗甚至免疫水平，其中，OM2-1在抗性和抗谱方面均表现最优；从居群来说，除景洪景讷和勐海勐往2个居群外，其余居群的抗性达到高抗甚至免疫的程度，耿马孟定的野生稻抗性表现最优；另外，大部分参试的疣粒野生稻杂合度高，同一居群的不同材料对白叶枯病的抗性差异大。
邢佳鑫1,陈玲2,柯学2,钟巧芳2,张敦宇2,付坚2,陈越2,肖素勤2,王玲仙2,王波2,殷富有2,陈丽娟1,程在全2
. 云南疣粒野生稻抗白叶枯病多菌系鉴定分析[J]. 中国稻米, 2020
, 26(3)
: 34
-42
.
DOI: 10.3969/j.issn.1006-8082.2020.03.009
Bacterial blight is one of the major rice diseases. Relevant studies showed that Oryza meyeriana has high resistance and even immune to bacterial blight. In order to explore the resistance of Oryza meyeriana on the different pathogens, 36 representative materials were evaluated by inoculating with 24 bacterial blight bacteria lines collected from China and abroad. The results showed that most of the tested materials showed typical symptoms of bacterial blight, and the lesions were brown spots with a lesion length of 0.00~0.30 cm. The overall resistance level of the tested materials was good, 44.44% of the materials reached high resistance and even immune level to 24 strains. Among them, OM2-1 is the best in both resistance and resistance spectrum. In terms of population, the resistance phenotype of other populations except Jinghong Jingne and Menghai Mengwang reached high resistance and even immunity, especially the population of Gengma Mengding had the best resistance. Furthermore, most of the tested materials had high heterozygosity, and the resistance of different materials in the same population to bacterial blight varied greatly.
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