基于核基因c-mos的鸫亚科部分鸟类系统发生关系

采用分子系统学方法对鸫亚科Turdinae 11属21种鸟类的核基因c-mos进行了系统发生分析.所测序列经对位排列后共572个位点,其中核苷酸变异位点111个,简约信息位点71个.以太平鸟Bombycilla garrulus作外群,采用邻接法、最大简约法和最大似然法分别构建其系统发生树.重建的系统发生树显示:所研究鸫亚科21种鸟类分成2个支系,第1个支系包括鸫属Turdus和地鸫属Zoothera.第2个支系包括红尾鸲属Phoenicurus、矶鸫属Monticola、水鸲属Rhyacornis、鸲属Tarsiger、溪鸲属Chainarrornis、石即鸟属Saxicola、燕尾属Enivurus、歌鸲属Luscinia和鹊鸲属Copsychus.红尾鸲属为并系类群,水鸲属和溪鸲属聚到这一支系;歌鸲属与燕尾属互为姐妹群,再与鸲属聚合构成另一支系;宝兴歌鸫Turdus mupinensis独立于鸫属及地鸫属之外,形成单独一个分支.

PHYLOGENETIC ANALYSIS OF SOME TURDINAE BIRDS BASED ON NUCLEAR C-MOS GENE SEQUENCES

In this study,we investigated phylogenetic relationships within the subfamily of Turdinae(Passeriformes,Muscicapidae) based on analysis of c-mos gene sequences.21 species in 11 genera from Turdinae were analyzed,and Bombycilla garrulous was selected as the outgroup.Altogether 572 bp gene fragments from these species were obtained,in which 111 variable sites and 71 parsimony informative sites were identified.We reconstructed the phylogenetic tree of Turdinae following the neighbor-joining,maximum parsimony and maximum likelihood method.The three phylogenetic trees generated nearly identical topologies.The species examined in this study clustered to two clades in the phylogenetic trees.The first clade included Turdus and Zoothera.The second clade included Phoenicurus,Chaimarrornis,Rhyacornis,Monticola,Saxicola,Tarsiger,Enivurus,Luscinia and Copsychus. The genus Phoenicurus was paraphyletic forming a well supported clade with the addition of two monotypic genera(Rhyacornis and Chaimarrornis).The genus Tarsiger was sister to Enivurus first,and then clustered with Luscinia.Turdus mupinensis was out of the two genera Turdus and Zoothera,forming a single clade.