转植酸酶基因玉米对田间节肢动物群落多样性的影响

【背景】节肢动物群落是农田生态系统的重要组成部分,转基因作物的种植对节肢动物群落结构及多样性的影响是环境安全评价的重要内容之一。转植酸酶基因玉米是我国首例获得生产应用安全证书的转基因粮食作物。【方法】以转植酸酶基因玉米10TPY005、非转基因亲本玉米蠡玉35和当地常规品种郑单958为试验材料,在大田种植条件下,采用直接观察法定期调查了玉米田间主要节肢动物的种类和发生数量,通过分析比较3个玉米品种田间节肢动物群落、天敌亚群落和害虫亚群落的多样性指数、均匀性指数以及优势集中性指数,研究了转植酸酶基因玉米对田间节肢动物群落多样性的影响。【结果】在各个调查时间,转植酸酶基因玉米10TPY005与亲本玉米蠡玉35相比,各群落指数均不存在显著性差异;随着玉米生育期的延长,各群落指数的变化趋势也基本一致。【结论与意义】转植酸酶基因玉米的短期种植,对田间节肢动物群落多样性没有明显影响。

Effects of phytase transgenic maize on biodiversity of arthropod communities under field conditions

【Background】The arthropod community is an important part of farmland ecosystems. The effect of transgenic crops on the structure and biodiversity of arthropod communities in the fields is one of the important subjects of the environmental safety evaluation. Phytase transgenic maize was the first transgenic crop that was issued a bio-safety certificate in China. 【Method】By using direct observation method,the species and population of the most common arthropod groups were investigated regularly in 3 experimental treatments including phytase transgenic maize 10TPY005 plot,its non-transgenic parent Liyu 35 plot and local corn variety Zhengdan 958 plot. The effects of phytase transgenic maize on the biodiversity of arthropod communities were studied by analyzing diversity index,evenness index and the Berger-Parker dominance index of the whole arthropod community,the natural enemy,and pest sub-communities. 【Result】There was no significant difference in any of above community indices between phytase transgenic maize 10TPY005 and its parent Liyu 35. The index dynamics of the arthropod community living in phytase transgenic maize10TPY005 and its parent Liyu 35 were also similar. 【Conclusion and significance】In the short term,the phytase transgenic maize did not significantly affect on the biodiversity of arthropod communities in cornfield.