The problems and obstacles remained in the research and utilization of resistant rice varieties to insect pests and the prospects of varietal resistance to insect pests in rice were discussed.
还讨论了水稻抗虫品种的研究与应用中仍然存在的难题和障碍，并展望其发展前景。
The abundance of medial resistant variety rice was higher than that of resistant or susceptible varieties.
品种之间以中抗品种的丰富度高于抗虫和感虫品种。
Stability of resistance of 12 rice varieties with different resistant levels in seedling stage was studied.
同时对12个具有不同抗性水平的水稻品种苗期的抗性表现进行了遗传型稳定性分析。
These results suggested that in vitro screened rice somatic mutants resistant to sheath blight had the similar resistant mechanism as general resistant varieties.
由此说明离体筛选的水稻抗纹枯病突变体的抗病机制与一般抗性品种类似。
Exploiting the resistant genes and developping resistant varieties has been improved to be the most effective way to control BLS in rice.
开发和利用水稻本身的抗病性，培育抗病品种是防治水稻细条病最简单有效的措施。
The rice bacterial blight (BB) is one of the most serious diseases in China. Breeding resistant varieties has proved to be the most effective and economical means to control the disease.
水稻白叶枯病是危害我国水稻生产的严重病害，培育抗病性品种是最有效的防治办法。
The results indicated that the frequency of resistant varieties is conrelated with rice types as well as altitude.
抗病品种的出现频率与稻种类型有关，也有明显的地区性。
The 9 resistant components to rice blast in 21 rice varieties were studied by principal component analysis.
应用主成分分析法研究了21个水稻品种对稻瘟病9个抗性组分。
This method is reliable, easy and fast in determining cold-resistant power of different rice varieties.
此鉴定方法可靠可行、方便、快捷，可用于水稻品种抗冷性的鉴定。
However, the resistant level in a few of rice varieties increased along with the increase of plant age.
但少数品种随着苗龄的增大，其抗虫性有不同程度的提高。
The effects of salt solution on growth rate of rice leaves were different depending on varieties extremely resistant to salt.
而盐溶液对极端耐盐水稻品种出叶速率的影响因品种而异。
Screening and utilization of rice resources resistant to blast is the foundational measure to breed resistant varieties.
抗病种质资源的发掘、研究与利用是水稻抗稻瘟病育种的重要基础。
Screening and utilization of rice resources resistant to blast is the foundational measure to breed resistant varieties.
抗病种质资源的发掘、研究与利用是水稻抗稻瘟病育种的重要基础。
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