Resistance Performances of Transgenic Bt Rice Lines T-2A-1 and T1c-19 Against Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

文献类型: 外文期刊

第一作者: Zheng, Xusong

作者: Zheng, Xusong;Yang, Yajun;Xu, Hongxing;Wang, Baoju;Lu, Zhongxian;Zheng, Xusong;Yang, Yajun;Xu, Hongxing;Wang, Baoju;Lu, Zhongxian;Chen, Hao;Lin, Yongjun;Chen, Hao;Lin, Yongjun

作者机构:

关键词: resistance;Cnaphalocrocis medinalis;Cry1C*;Cry2A*;rice

期刊名称:JOURNAL OF ECONOMIC ENTOMOLOGY ( 影响因子:2.381; 五年影响因子:2.568 )

ISSN: 0022-0493

年卷期: 2011 年 104 卷 5 期

页码:

收录情况: SCI

摘要: The transgenic Bacillus thuringiensis (Bt) rice, Oryza sativa L., lines T-2A-1 and T1c-19 expressing Cry2A* and Cry1C* from 'Minhui 63' (MH63) were evaluated for resistance to newly hatched and third-instar larvae of Cnaphalocrocis medinalis (Lepidoptera: Pyralidae), by using detached leaf laboratory bioassays. Both T-2A-1 and T1c-19 rice showed high C. medinalis resistance; however, the lethal time (LT)(50) of larvae fed with T-2A-1 rice was significantly longer than that of larvae fed with T1c-19 rice, implying T1c-19 rice was more toxic to C. medinalis larvae. Larval mortality after 4 d on nitrogen-free MH63 was 25.5% compared with 2.4% mortality on high nitrogen fertilizer (250 kg N/ha) plants. Larval mortality on high nitrogen T-2A-1 plants declined by 20% compared with nitrogen-free plants. However, resistance in T1c-19 plants was unaffected by nitrogen fertilizer. C. medinalis moths preferred MH63 at both the seedling and grain milk stages for oviposition but not the T1c-19 and T-2A-1 Bt rice lines.

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