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几种杀虫药剂敏感蚊类酯酶多态性的研究

Esterase polymorphism in insecticide susceptible populations of the mosquitoes
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摘要 通过蚊虫酯酶蛋白的淀粉凝胶电泳分析和基因组DNA的限制性酶切片段长度多态性(RFLPs)比较 ,对尖音库蚊Culex pipiens、三带喙库蚊 Culextritaeniorhynchus 和中华按蚊Anophelessinensis有机磷杀虫药剂敏感种群的酯酶蛋白和结构基因的多态性进行分析。发现在蛋白质水平上 ,三带喙库蚊敏感种群 (n =5 4)在酯酶α和 β位点分别存在 2个和 3个等位基因 ,在DNA水平上有 2 9%的个体具有与酯酶 β11基因 1 3kbcDNA片段同源的 1 3kb单拷贝带存在。发现中华按蚊敏感种群 (n =5 0 )中具有低活性的非特异性酯酶存在 ,在蛋白质水平上 ,酯酶α和β位点各有一个等位基因 ;在DNA水平上 ,通过对单个蚊虫基因组DNA的研究未发现有与酯酶β11基因同源的酯酶编码基因的存在。对尖音库蚊北京敏感种群 (n =6 4)的研究发现 ,在酯酶α和 β位点都存在 5个等位基因 ,在DNA水平上 ,使用一个限制性内切酶 (EcoRI) ,15只蚊虫的样本在酯酶β位点发现了 5个等位基因 ,说明在尖音库蚊北京敏感种群的酯酶 β基因周围存在着较大的中性多态性 ,在有机磷杀虫剂的选择下 。 Three susceptible mosquito populations from China were analyzed for esterase haplotype polymorphism by starch gel electrophoresis and RFLP analysis. At the protein level, 2 and 3 alleles were found for esterase α and β respectively in a Culex tritaeniorhynchus population ( n =54), at the DNA level, with the use of one restriction enzyme ( Eco RI), only 2 9% individuals were detected sharing a 1 3 kb single copy band which is homologous with the 1 3 kb cDNA fragment of esterase β1 1 gene. In a ...
出处 《昆虫学报》 CAS CSCD 北大核心 2000年第S1期13-19,共7页 Acta Entomologica Sinica
基金 国家自然科学基金资助项目! (N :39840 0 0 4 )
关键词 蚊虫 酯酶 有机磷杀虫剂 限制性酶切片段长度多态性 基因扩增 迁移 mosquito esterase organophosphate insecticide RFLP gene amplification migration
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参考文献10

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