基于S7核糖体蛋白基因部分序列的石鲈属鱼类分子系统进化关系

基于核DNA分子标记S7核糖体蛋白基因内含子1部分序列对分布于南海及美洲,非洲,大洋洲等周边海区的石鲈属鱼类11种,结合石鲈亚科其他属如仿石鲈属,异孔石鲈属,八带石鲈属及锯鳃石鲈属等21种鱼类的系统进化关系进行了研究分析。利用最大简约法以及贝叶斯法构建了系统进化树。进化树上,石鲈属的种类并没有形成一个单系,除了大斑石鲈,断斑石鲈等6种石鲈属鱼类聚成一石鲈属的分支外,其他石鲈属种类都位于进化树的不同位置。侧扁石鲈与八带石鲈聚在一起,大棘石鲈与异孔石鲈属聚在一起。红海石鲈与纵带石鲈与仿石鲈属的种类关系较近,佩氏石鲈最先分化出来,位于整个石鲈亚科分支基部。该分类关系与其各自的地理分布情况有着一定的联系。

Molecular phylogenetic relationships of Pomadasys fishes based on partial S7 ribosomal protein gene sequences

Molecular phylogenetic relationships of 21 species including 11 Pomadasys and 10 other Haemulinae species collected from the water regions of China,America and Africa were analyzed using partial sequences of the 1st intron of S7 ribosomal protein gene. The phylogenetic trees were constructed using a methed of maximum parsimony and Bayesian inference. The result revealed that Pomadasys groups were non-monophyletic. Apart from a small group formed by six Pomadasys species,other Pomadasys were grouped in different positions of the phylogenetic trees. Pomadasys corvinaeformis was clustered with Conodon nobilis and Pomadasys macracanthus was clustered with Anisotremus species,Pomadasys stridens and Pomadasys striatum were closely related with Haemulon. Pomadasys peroteti was first separated and rooted on the basis of the Haemulinae clade. Such phylogenetic relationships were found to be correlated with their geographic distributions.