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为探究转Bt基因抗虫水稻对稻田水生生物的安全性,以转Cry1Ab/Ac基因抗虫水稻华恢1号(HH1)为材料,其非转基因水稻亲本明恢63(MH63)为对照,以底栖动物群落为指示生物,运用群落学方法研究了湖南湘潭转Bt水稻对稻田底栖动物群落的影响。结果显示,2012年在HH1与MH63稻田中,分别采集到底栖动物37种和38种,二者共有物种31种,群落物种相似度为0.8267,优势种相似度为0.8235;2013年在HH1与MH63稻田中分别采集到底栖动物40种和41种,二者共有物种33种,群落物种相似度为0.8148,优势种相似度为0.9231;2012与2013年在HH1与MH63稻田生境中,物种丰富度、个体数量、群落多样性指数、均匀性指数与优势集中性指数的时间动态趋势一致,且均无显著差异。研究表明,连续2年稻田种植转Cry1Ab/Ac基因抗虫水稻HH1,在群落水平上对湖南湘潭地区稻田底栖动物无显著影响。
In order to explore the safety of Bt transgenic rice on aquatic organisms in rice paddy field, the transgenic rice Huh-hu 1 (HH1) was used as a control and the parental non-transgenic rice Minghui 63 (MH63) The community of benthic organisms was the indicator organism. The community-based method was used to study the impact of Bt rice from Xiangtan, Hunan Province on zoobenthos community in paddy fields. The results showed that in 2012, 37 species and 38 species of zoobenthos were collected in HH1 and MH63 paddy fields, respectively. There were 31 common species in both species, the similarity of community species was 0.8267, and the similarity of dominant species was 0.8235. Between HH1 and MH63 In the paddy field, 40 species and 41 species of zoobenthos were collected, respectively. There were 33 common species in both of them. The similarity of community species was 0.8148, and the similarity of dominant species was 0.9231. Among the HH1 and MH63 paddy habitats in 2012 and 2013, the species richness, The trend of temporal dynamics of individuals, community diversity index, evenness index and dominant concentration index were the same, and there was no significant difference. The results showed that Cry1Ab / Ac transgenic rice HH1 was planted for two consecutive years in paddy field, and had no significant effect on the benthic animals in the Xiangtan area of Hunan Province.