Biotechnology Bulletin ›› 2016, Vol. 32 ›› Issue (6): 69-75.doi: 10.13560/j.cnki.biotech.bull.1985.2016.06.011

• Research report • Previous Articles     Next Articles

Resistance Evaluation of Bt cry1Ah-transgenic Maize to Asian Corn Borer, Cotton Bollworm and Oriental Armyworm

SONG Miao1,2, WANG Hai2, ZHANG Jie3, HE Kang-lai3, LIANG Ge-mei3, ZHU Li2, HUANG Da-fang2, LANG Zhi-hong2   

  1. 1. School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010
    2. Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081
    3. State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193
  • Received:2016-03-04 Online:2016-06-27 Published:2016-06-28

Abstract: Bt cry1Ah gene was transferred into inbred line maize Zong31 via Agrobacterium-mediated method,and transgenic maize HGK60 with significant resistance to corn borer was acquired. In order to investigate its insecticidal activity to Lepidoptera pests,we evaluated the insecticidal effects of HGK60 to Asian corn boner(Ostrinia furnacalis),cotton bollworm(Mythimna separate(Walker))and oriental armyworm(Helicoverpa armigera Hubne)through laboratory and field bioassay. The results of laboratory bioassay indicated that no Asian corn boner feeding on HGK60 leaves survived. HGK60 presented the toxic effect on neonate of cotton bollworm,and different tissues of it had different insecticidal effects. Compared to the non-transgenic maize,the body-weight of armyworm neonate was significantly inhibited after a week of feeding HGK 60 leaves. The results of field bioassay showed that HGK60 had solid insecticidal effects to O. furnacalis and H. armigera in high resistance level,while the efficacy to M. separate was in resistance level.

Key words: cry1Ah gene, maize, Ostrinia furnacalis, Helicoverpa armigera, Mythimna separate Hubne