利用国内外的119份地方水稻品种资源材料通过InDel分子指数法分析水稻条纹叶枯病的抗性与籼粳分化的关系。在119份水稻品种中48份典型籼稻,其中47份抗水稻条纹叶枯病；7份籼稻和1份偏籼的水稻品种,也都抗条纹叶枯病；2份中间型的水稻品种，不抗条纹叶枯病；2份粳型的水稻品种，抗条纹叶枯病；59份典型粳稻品种，都不抗水稻条纹叶枯病。相关性分析表明籼型基因频率与水稻条纹叶枯病发病率呈极显著负相关。这些结果表明携带籼型基因频率越高的水稻材料，对水稻条纹叶枯病的抗性越强，而典型粳稻都表现为感病，推测水稻条纹枯病抗病基因可能起源于籼稻。
The correlation between resistance to Rice stripe virus（RSV） and indicajaponica differentiation of 119 rice landrace varieties was analyzed by using indicajaponica differentiation indexes based on the InDel molecular markers analysis. Fortyeight varieties classified into indica type are resistant to RSV, and 7 indica landraces and 1 indicaclinous landrace are also resistant to RSV; however，two intermediate landraces are susceptible to RSV. In addition, fiftynine typical japonica landraces are susceptible to RSV. The statistical analysis indicated there existed significantly negative correlation between estimated indica gene frequency and the RSV disease incidence. These results show that the landraces harboring more indica gene are more resistant to RSV disease and typical japonica landraces all show susceptibility to RSV. Therefore, it was speculated that the RSV resistance gene originated from indica varieties.
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