转cry1 Ab基因粳稻对稻田节肢动物群落的影响

在将稻田节肢动物群落按营养关系分为植食类、寄生类、捕食类、腐食类和其他类等5个功能团的基础上,从功能团优势度、群落结构参数及群落相异性等方面,经2年3点的调查就2个转cry1Ab基因粳稻（Bt粳稻）品系KMD1和KMD2对稻田节肢动物群落结构的影响做了评价。结果表明：在大多数情况下,Bt粳稻与对照间各功能团优势度、群落结构参数物种丰富度（S）、Shannon-Wiener多样性指数（H′）、均匀性指数（J）、优势集中性指数（C）]及其时间动态无明显差异;Bt粳稻与对照间植食类、寄生类、捕食类亚群落,及整个节肢动物群落的相似性也较高。综合分析认为,Bt粳稻对稻田节肢动物群落结构无明显的负面影响。

Impact of transgenic cry l Ab japonica rice on the arthropod community of rice paddies in China

The community of arthropods in rice paddies was sampled at three locations over two years. The arthropods captured were divided into five feeding guilds ： phytophages, parasitoids, predators, dctritivores and others. The effects of two transgenic Bacillus thuringiensis cryl Ah japonica lines （KMD1 and KMD2） were evaluated in terms of guild dominance, family composition and dominance, as well as several indicdes of diversity. The control community was the one present on the untransformed parental rice line Xiushui ll. Compared with the control paddies, the guild dominance, species richness （ S）, Shannon-Wiener＇ s diversity index （H＇） , evenness index （J） and Simpson＇s dominance index （C） , and the temporal dynamics of Bt rice paddies showed no significant difference at the most situation. The dissimilarities between phytophagous sub-communities, parasitoid sub-communities, predator sub-communities and arthropod communities as a whole in Bt rice plots and the control were apparently low. It was apparent that the transgenic cryl Ab japonica rice has no negative effect on the rice paddy arthropod community.