同脉缟蝇亚属种团间的系统发育关系初探

Preliminary study on phylogeny of species groups in subgenus Homoneura

选取2个线粒体基因COI和16S-r RNA,2个核基因Elongation factor 1-α和28S-r RNA,初步探讨同脉缟蝇亚属种团间的系统发育关系,研究表明,翅斑的减少是趋于原始的性状;基于线粒体基因COI和16S-r RNA构建的NJ、ME、MP、ML系统树中,MP树更与形态分类的研究结果一致;而基于Elongation factor 1-α和28S-r RNA基因构建的NJ、ME、MP、ML系统树反映的系统发育关系完全相同;以同脉缟蝇亚属18种为代表构建的6个种团的系统发育关系并没有呈现出一致的规律性,不能从分子水平验证根据已有的外部形态特征划分种团的可靠性。

Based on two mitochondrial genes （COI and 16S-rRNA） and two nuclear genes （Elongation factor 1-alpha and 28S-rRNA）, the phylogenetic relationships among six species groups of subgenus Homoneura were preliminarily studied. The results showed that decreasing in quantity of wing spots is a trend to origin; the phylogeny presented from MP could keep better accord with morphological taxonomy than others among the NJ, ME, MP and ML buihed by mitoehondrial genes （COI and 16S-rRNA）, while all NJ, ME, MP and ML buihed by the nuclear genes （Elongation factor 1-alpha and 28S-rRNA） phylogeny reflected the same phylogenetic relationships. The phylogenetic relationships from 18 representative species of 6 species groups of subgenus Homoneura could not show some consistent regularity, so the reliability of the existing species group constructed with artificial classification could not be verified from the molecular level.