基于线粒体基因cyt b的鹟亚科部分鸟类系统发育

采用分子系统学方法对鹟亚科(Muscicapinae)6属31种鸟类的cytb基因序列992bp进行系统发生分析。以荒漠伯劳(Lanius isabellinus)和发冠卷尾(Dicrurus hottentottus)为外群,采用贝叶斯法(Bayesian,BI)、最大似然法(Maximum-likelihood,ML)和最大简约法(Maximumparsimony,MP)分别构建鹟亚科的系统发育树。结果支持:寿带属(Terpsiphone)、扇尾鹟属(Rhipidura)与方尾鹟属(Culicicapa)可从鹟亚科中移出,其中寿带属归入王鹟科(Monarchidae),扇尾鹟属与方尾属归入扇尾鹟科(Rhipiduridae);鹟属(Muscicapa)、仙鹟属(Niltava)为单系发生,并聚为姐妹群,亲缘关系较近;姬鹟属(Ficedula)并非单系发生,白眉姬鹟(Ficedulazanthopygia)在3种系统发生树中的位置差别较大,研究结果未能确定其分类地位;铜蓝(Muscicapa thalassina)与白腹蓝(Cyanoptila cyanomelana)亲缘关系较近,前者应从属中移出,后者应从姬属移出,共同归入仙属或列为仙属的姐妹属。上述结论解决了亚科部分有争议属、种间的进化关系,为亚科分类系统提供了DNA水平证据。

Phylogeny of some Muscicapinae species based on cyt b mitochondrial gene sequences

This paper investigated phylogenetic relationships within the Muscicapinae based on analysis of cytochrome b mitochondrial gene sequences involving 992 bp of 31 species representing 6 putative Muscicapinae genera.Lanius isabellinus and Dicrurus hottentottus were selected as outgroups.Phylogenetic trees were reconstructed using methods of Bayesian(BI),maximum-likelihood(ML)and maximum parsimony(MP).The results suggest to move Terpsiphone from Muscicapinae to Monarchidae.Rhipidura and Culicicapa should be placed into the Rhipiduridae from Muscicapinae.Both Muscicapa and Niltava are monophyletic taxa,and Muscicapa is the sister-group and a close relative of the Niltava clade.Ficedula is not monophyletic,and the status of Ficedula zanthopygia is different in the three putative phylogenetic trees,so that the analysis did not confidently resolve the status of this species.The results also indicate that Muscicapa thalassina is closely related to Cyanoptila cyanomelana,and they should be placed in Niltava or be the sister genus to Niltava.These results resolve the phylogenetic relationships among some controversial genera and species of Muscicapinae,and provide a molecular phylogenetic evidence for taxonomic research of Muscicapinae.