Resistance Performances of Transgenic Bt Rice Lines against Cnaphalocrocis medinalis
October 21, 2011| |
Bt rice lines T2A-1 and T1c-19 expressing Cry2A and Cry1C from ‘Minhui 63' (MH63) were evaluated by Xusong Zheng of Zhejiang Academy of Agricultural Sciences and other scientists for resistance to newly hatched and third-instar larvae of rice leafroller (Cnaphalocrocis medinalis), a pest of rice, corn, wheat, and sorghum.
Results of the detached leaf laboratory bioassays revealed that both rice lines exhibited high resistance to rice leafroller but the lethal time of the larvae fed with T2A-1 was significantly longer than than of the larvae that consumed T1c-19, indicating that T1c-19 is more toxic to larvae. The researchers also found out that application of nitrogen fertilizer did not affect the resistance in T1c-19 plants.
Check out the details of the research at http://www.bioone.org/doi/abs/10.1603/EC10389
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