Abstract: 【Objective】 The objective of this study is to assess the effects of transgenic glyphosate-tolerant (EPSPS) and insect-resistant (Bt Cry1Ab) maize DBN9936 on biodiversity of arthropod communities, which will supply basic data for transgenic crop biosafety. 【Method】 In the growing period in 2015, the biodiversity and its structure of arthropod communities in the fields of transgenic maize and its counterpart lines were compared in the experimental base in Yitong Autonomous County for Man Nationality, Siping City, Jilin Province. In the isolated maize field, with the method of observation, traps and observing the longitudinal section of stems, the number of species and individuals in the maize plants, on the ground and in the stems were counted and the functional groups, biodiversity index, dominant concentration index, evenness index and the community similarity were analyzed and compared. 【Result】The arthropod communities in maize fields were composed of 13 orders and 44 families. The main pests included Rhopalosiphum maidis, Monolepta hieroglyphica and Osrtinia furnacalis; the main predatory enemies were lacewings, ladybirds and spiders. The number of target lepidoptera insects, including O. furnacalis and Helicoverpa armigera, from the transgenic maize DBN9936 in the whole growth period was significantly lower than those from the counterpart DBN318 and the conventional line Xianyu 335. The number of M. hieroglyphica from the transgenic maize was similar with the recipient line DBN318, while significantly higher than that from conventional line Xianyu 335, which showed the difference coming from variation between lines, rather than the genetically modification. The number of non-target arthropod in the fields had no significant difference between the other treatments. Sampling at the time of 2 and 4 weeks after spraying glyphosate, the number of specie and individual of arthropod communities in the fields had no significant difference between each two treatments. The number of boring insects and their damage were investigated during harvest, the number of holes, alive pests, the length of tunnel and the number of corns with damaged tip were significantly lower in DBN9936 than those in DBN318 and Xianyu 335, which showed that the transgenic maize DBN9936 had obviously higher resistance to O. furnacalis and H. armigera. Compared with the non-transgenic recipient line maize DBN318 and the regular line Xianyu 335, transgenic maize DBN9936 had the similar dynamic trend within the parameters of the number of species, biodiversity index, dominant concentration index and evenness index, and there was no significant difference. The similarity index of arthropod communities of DBN9936 with or without the herbicide to the recipient line DBN318 were gradually rising to a high level and maintained, which indicated that the difference of the arthropod communications from different treatments would be decrease in growing period.【Conclusion】In the study, the biodiversity dynamics of the arthropod communities of different treatments were similar. Combined climate recordings and field observation, the fluctuation of the dynamics from late July to mid August in 2015 could be regarded as the biodiversity decrease, especially the increase of dominant concentration index and the decrease of evenness index caused by the drought and the outbreak of M. hieroglyphica. These results suggested that the arthropod community structures in the fields of the transgenic maize DBN9936, the counterpart DBN318 and the conventional line Xianyu 335 were similar, and the effects of genetically modified maize on non-target arthropod community were not significant.

Key words: transgenicmaize(Zea mays), arthropod community, biodiversity, dominance index, evenness index