取食不同品种棉花的棉蚜对龟纹瓢虫功能反应的影响
Effect of cotton aphids feeding on transgenic cotton varieties on the behavior of Propylaea japonica
谢修庆 陆佩玲 胡蒙蒙 苏宏华 杨益众
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DOI：
作者单位：扬州大学园艺与植物保护学院扬州 225009
中文关键词：转基因棉，棉蚜，龟纹瓢虫，功能反应
英文关键词：transgenic cotton，Aphis gossypii，Propylaea japonica，predatory functional responses
中文摘要： 本文以GK12、33B 和SGK321 3 种转基因棉和对应的3 种常规棉泗棉3 号、33 及石远321 为材料，通过室
内测定，研究了取食转基因棉的棉蚜Aphis gossypii Glover 对龟纹瓢虫Propylaea japonica Thunberg 1 ～ 4 龄幼虫功能反应的影响。结果指出，龟纹瓢虫对来自转基因棉田蚜虫的捕食量大多高于常规棉田，且捕食量随猎物密度的增加而增大。在1、2 龄幼虫期，龟纹瓢虫取食转双价基因棉田蚜虫的数量多高于取食转单价基因棉田的蚜虫数量，但是在3、4 龄幼虫时，龟纹瓢虫取食转双价棉田蚜虫的数量多低于取食转单价棉田的蚜虫数量。龟纹瓢虫对来自转基因棉田棉蚜的捕食功能反应符合HollingⅡ型。龟纹瓢虫1 龄幼虫取食GK12 和SGK321 2 个转基因棉田蚜
虫的最大日捕食量大于对照，处理时间短于对照;龟纹瓢虫P． japonica 2、3 龄幼虫取食33B 和SGK321 2 个转基因棉田蚜虫A． gossypii 的日最大捕食量大于对照，处理时间短于对照;4 龄时取食转基因棉田蚜虫的数量都大于对照，处理时间均短于对照，其中取食转双价基因棉SGK321 棉田蚜虫的日最大捕食量小于取食单价棉田蚜虫的日
最大捕食量。
英文摘要：
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The effect of Aphid gossypii Glover feeding on the transgenic cotton varieties GK12，33B and SGK321 and conventional cotton varieties Simian3，33 and Shiyuan321，on the predatory behavior of Propylaea japonica Thunberglarvae was investigated． The results show that the relative biomass ofP． japonica toA． gossypii was higher on transgenic cotton than on conventional cotton and that the number ofP． japonicaincreased with prey density． MoreA． gossypii were preyed on by 1 st and 2 nd instar larvae ofP． japonicaon SGK321 than on GK12 and 33B． Conversely，moreA． gossypii were preyed on by 3 rd and 4 th instar larvae ofP． japonicaon GK12 and 33B plants than on SGK321 plants． The predatory responses ofP． japonica toA． gossypii feeding on transgenic cotton fitted the Holling－Ⅱequation． The maximum daily predation rate of 1 st ． japonica larvae onA． gossypii was higher on GK 12 and SGK321 plants than on controlplants and processing time was shorter than on control plants． The maximum daily predation rate of 2nd ． japonicalarvae was higher on 33B and SGK321 plants and processing time was shorter compared to control plants． The maximum daily predation rates of 4and 3 rd instarPinstarPth instar larvae on all three transgenic cotton varieties were greater than those of larvae on control plants，and processing time was shorter than on control plants． In addition，the maximum daily predation rate ofP． japonicaon the dual toxin transgenic cotton SGK321 was less than that on the single toxin varieties GK12 and 33B．
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