转RRM2基因棉和其亲本苗蚜种群数量及其优势天敌的动态规律

【目的】转基因作物的大规模种植,可能会对人类健康和生态环境造成影响。因此,商业化种植之前,评价环境安全性十分必要。【方法】以转基因(RRM2)高产棉为实验品种,受体材料中棉所12为对照品种,分别于2013年和2014年连续2年对2种棉田的苗期蚜虫及其几种主要捕食性天敌的田间种群数量进行系统的田间调查,并比较它们在这2种不同棉田间的差异。【结果】与中12相比,转RRM2基因棉苗期无翅蚜的发生数量显著增加,有翅蚜迁入棉田的数量也有所增加,但二者差异不显著;2个棉花品系间棉蚜的几种主要捕食性天敌发生数量也无明显差异。【结论】与亲本材料相比,转高产棉花苗蚜数量显著增加,但其捕食性天敌数量增加不明显。本研究为转RRM2高产基因棉花环境安全评价技术的完善提供了理论依据。

Population dynamics of the cotton aphid (Aphis gossypii) and its natural enemies on the transgenic RRM2 cotton and its parental cultivar in Anhui Province, China

[Aim] Large-scale cultivation of transgenic GM crops may have unwanted ecological effects, triggering the need for environmental safety assessments before commercial release.[Method] Plots of a high-yielding transgenic (RRM2) cotton cultivar and its parental conventional cotton (CCRI12) were systematically surveyed to examine the field population density of the cotton aphid and several natural enemies in 2013 and 2014 in Anhui Province, China.[Result] The type of wingless aphid in transgenic RRM2 cotton increased significantly compared with its non-transgenic parent, cv. CCRI12. Densities of winged Aphis gossypii also increases, but the difference was not significant. The population densities of several predators was no significantly different between these two cultivars.[Conclusion] The studied transgenic cotton cultivar supported more cotton aphids than its parental isoline, but this was not followed by an increase in the field population density of predators. This study could contribute to the assessment of environment safety of the new GM cotton.