中哈边境阿拉山口口岸输入性猫栉首蚤指名亚种线粒体COⅠ和COⅡ基因序列分析

来源 :中国人兽共患病学报 | 被引量 : 0次 | 上传用户:jxt1
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目的 分析阿拉山口口岸地区输入性猫栉首蚤指名亚种细胞色素C氧化酶Ⅰ(COⅠ)和Ⅱ(COⅡ)基因特征和系统进化关系.方法 从2014年1月入境集装箱死猫体表采集蚤类样本,形态学鉴定完毕后提取DNA,PCR扩增COⅠ和COⅡ基因并测定序列,使用Mega 6.0通过ML法构建系统发育树.结果 猫栉首蚤指名亚种COⅠ和COⅡ基因富含A+T,碱基突变多为置换突变,无移码,缺失和插入突变;Blast显示与澳大利亚猫栉首蚤指名亚种同源性较高(99%).结论 COⅠ基因序列存在足够的变异能够区分亲缘关系很近的种类,为外来或新发现的蚤种的鉴别提供了分子水平的技术依据.
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