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MOLECULAR SYSTEMATIC STUDY ON PENTATOMIDAE (HEMIPTERA, HETEROPTERA) FROM CHINA BASED ON MITOCHONDRIAL CYTOCHROME OXIDASE Ⅱ GENE
Author(s): 
Pages: 239-246
Year: Issue:  2
Journal: ACTA ZOOTAXONOMICA SINICA

Keyword:  半翅目蝽科分子系统学线粒体COⅡ基因中国;
Abstract: 扩增并测定了我国蝽科4亚科8属11种昆虫线粒体COⅡ基因585 bp的序列,对序列的碱基组成、转换颠换、遗传距离等进行分析,探讨了COⅡ基因在该科的分子进化机制.并基于COⅡ基因序列数据,分别采用邻接法(NI)、最大简约法(MP)和贝叶斯推论法(BI)建立蝽科分子系统发育关系.研究结果表明,蝽科昆虫COⅡ基因A+T含量平均为71.7%,存在较强的A+T含量偏向性,氨基酸的变异率为27.2%;亚科间的遗传距离介于0.168~0.242之间,大于亚科内属种间的遗传距离,蝽科与盾蝽科2外群之间遗传距离最大,两科之间存在明显的间断.分子系统发育树表明,短喙蝽亚科为蝽科中较为原始的类群,分化较早,益蝽亚科与舌盾蝽亚科关系较近,形成一对姐妹群,蝽科中捕食性种类--益蝽亚科是较为特化的类群,它是由植食性种类分化而来.蝽科4亚科间的分子系统发育关系为Phyllocephalinae+(Pentatominae+(Asopinae+Podopinae).
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