蚁科弓背蚁属部分种的分子系统学研究

Molecular Phylogenetic Research on Some Species of Camponotus (Hymenoptera:Formicidae)

对弓背蚁属12种昆虫的线粒体细胞色素b(Cyt b)基因部分序列进行测定,获得了长度为487 bp的序列片段。基于Cyt b基因序列数据,采用邻接法(NJ)、最大简约法(MP)和最大相似法(ML)分析其系统发育关系,研究结果表明,弓背蚁属12种蚂蚁分成4支:第一个支系包括杂色弓背蚁C.variegates、拟光腹弓背蚁C.pseudoirritans、黄斑弓背蚁C.albosparsus和弓背蚁C.sp1;第二个支系由尼科巴弓背蚁C.nicobarensis、弓背蚁C.sp2和日本弓背蚁C.japonicus组成;第三个支系包含哀弓背蚁C.dolendus、少毛弓背蚁C.spanis与平和弓背蚁C.mitis;第四个支系由弓背蚁C.sp和浅毛弓背蚁C.albivillosus组成,属内种间的分类关系明确。遗传距离的分子数据支持将未定种弓背蚁C.sp定为弓背蚁属的新种。

Nucleotide composition and Phylogenetic relationship among 12 species in Carnponotus （Hymenoptera： Formicidae） based on 487 bp sequences of Cyt b gene were studied. The phylogenetic trees were constructed with NJ,MP and ML methods ,and the results showed that these ants were divided into four lineages. The first lineage consist of 4 species,C, variegates,C, pseudoirritans,C, albosparsu and C. spl. The second lineage 3 species,C, nicobarensis,C, sp2 and C. japonicus. The third 3 species,C, dolendus,C, spanis and C. mitis. And the rest 2 species,C, spanis and C. mitis belong to the fourth lineage. The taxonomic relationships and resolutions among species were definited. The molecular evidences of genetic distance defines C. sp as a new species of the Genus Camponotus.