不同水稻品种对褐飞虱的抗性评价

Resistance of different rice varieties (lines) to the brown planthopper (Nilaparvata lugens)

【目的】调查目前江西主栽水稻品种对褐飞虱Nilaparvata lugens(St?l)的抗性级别,为抗褐飞虱水稻品种的选育、推广和褐飞虱的防治提供基础数据。【方法】采用标准苗期集团筛选法,评价了江西推广的25个水稻品种(3个早稻品种,15个中稻品种,7个晚稻品种)苗期和成株期对褐飞虱的抗性。【结果】早稻品种苗期和成株期的抗级为7级(感虫)或9级(高感);中稻品种中隆两优534和五山丝苗苗期抗级为5级(中抗),但成株期抗性丧失,其余品种苗期、成株期的抗性等级为7级(感虫)或9级(高感);晚稻品种高优红88和丰源优2297苗期抗级分别为7级(感虫)和9级(高感),成株期抗级均为5级(中抗),其余品种苗期、成株期的抗级为7级(感虫)或9级(高感)。【结论】目前在江西普遍种植的水稻品种中,多为感虫和高感品种,抗性品种较少,且抗性不高。

[Objectives] To provide basic data for developing and promoting the use of rice varieties resistant to the brown planthopper（BPH） Nilaparvata lugens（St？l）. [Methods] The resistance of 25 rice varieties, including 3 early varieties, 15 middle varieties, and 7 late, varieties, to BPH was evaluated using the standard seedbox screening technique（SSST） during both the seedling and adult stages of growth. [Results] All 3 early-rice varieties were either sensitive, or highly sensitive, to BPH during both the seedling and adult stages. Two middle-rice varieties, Longliangyou534 and Wushansimiao, were moderately resistant to BPH at the seedling stage, but sensitive to BPH at the adult stage. The other 13 middle-rice varieties were either sensitive, or highly sensitive, to BPH. Two late rice varieties, Gaoyouhong88 and Fengyuanyou2297, were moderately resistant to BPH at the adult stage, but sensitive to BPH at the seedling stage. The other 5 late-rice varieties were sensitive, or highly sensitive, at both the seedling and adult stages. [Conclusion] At present, most of the rice varieties planted in Jiangxi are sensitive, or highly sensitive, to BPH and the few resistant varieties have relatively low resistance to this pest.