缘蝽科部分种类线粒体COII基因的分子系统学研究(半翅目:异翅亚目)

Molecular Phylogenetic Research of Partial Species of Coreidae (Hemiptera: Heteroptera) Inferred from COII Gene

测定分析了缘蝽科18种昆虫COII基因部分片段,结果显示,T、C、A、G的平均含量分别为33.6%、16.4%、36.3%和13.7%.A+T平均含量达到69.9%,表现出较强的A+T含量偏向性.碱基替换中转换频率是颠换的1.1倍;转换的发生以T与C之间为主,颠换以T与A之间为主.从GenBank下载长蝽总科的Oncopeltus fasciatus和猎蝽总科的Triatoma dimidiata作为外群,建立缘蝽科17属18种间的系统发育关系.结果证明狭义巨缘蝽族为一个单系群,竹缘蝽族的两个属为一单系群,鼻缘蝽属与同缘蝽属亲缘关系非常近,环胫黑缘蝽(沟缘蝽亚科)和竹缘蝽族亲缘关系比较近,叶足特缘蝽和怪缘蝽亲缘关系较近.

Parts of mtDAN-COII gene were sequenced and analyzed in 18 species of Coreidae . The average contents of T. C. A and G to COIl gene of 18 species in Coreidae are 33.6%, 16.4%, 36.3% and 13.7%, respectively. A＋T content is 69.9% ,which shows a strong A＋T bias. To these 18 species of Coreidae, ratio of transition to transversion（R） of COII gene sequence is 1.1 ; transitions are slightly higher than transversions; most transitions occur between T and C, while most transversions occur between A and T. The phy｜ogenetic relationships among 18 species of Coreidae and the outgroups which include Oncopehus fasciatus （Hemiptera： Lygaeoidea） and Triatoma dimidiate （Hemiptera： Reduviidae） had been reconstructed. The results show that： Mictini s. str is a monophyleny; two genera of Cloresmini is a monophyletic; Sinotagus has a close kinship with Homoeocerus, Hygia touchei （Colpurinae） has a close kinship with Cloresmini, Trematocoris tragus has a close kinship with Cordysceles turpis.