基于12S rRNA部分序列分析的中国8种笛鲷科鱼类系统发育初探  

Phylogeny of eight snappers(Lutjanidae) in Chinese coastal waters inferred from partial mtDNA 12S rRNA Sequences

作　　者：唐优良[1] 章群[1] 余帆洋 周佳怡[1] 司丛利[1] 黄小彧[1] 马奔[1] 

机构地区：[1]暨南大学水生生物研究所,广东广州510632

出　　处：《海洋科学》2011年第2期22-26,共5页Marine Sciences

基　　金：国家自然科学基金资助项目(30770415;41071034);留学归国人员科研启动基金项目(2005);暨南大学科研培育与创新基金资助项目(21609710)

摘　　要：测定了中国近海8种笛鲷鱼类线粒体12S rRNA基因部分序列,结合GenBank中下载的2种笛鲷鱼类序列,以鲈形目(Perciformes)中的单列齿鲷(Monotaxis grandoculis)、黄带裸颊鲷(Lethrinus obsoletus)、尖嘴蓝子鱼(Siganus unimaculatus)、褐蓝子鱼(Siganus fuscescens)和金眼鲷目(Peryciformes)中的点鳍棘鳍鱼(Sargocentron rubrum)、大鳞锯鳞鱼(Myripristis berndti)、红金眼鲷(Beryx splendens)以及鲤形目(Cypriniformes)中的印度斑马鱼(Danio rerio)为外类群,构建最大似然树和贝叶斯推断树,发现在895bp的同源序列中,共有170个变异位点,其中简约信息位点126个,转换/颠换值为2.39;最大似然树和贝叶斯推断树显示梅鲷鱼类(Caesioninae)镶嵌在笛鲷科(Lutjanidae)鱼类中,支持将梅鲷科并入笛鲷科的观点,但是梅鲷属在笛鲷科中的系统位置需要进一步研究;马拉巴笛鲷(Lutjanus malabaricus)与千年笛鲷(Lutjanus sebae)聚为一支,支持根据形态学特征的分类处理;但形态相似的约氏笛鲷(Lutjanus johni)和紫红笛鲷(Lutjanus argentimaculatus)的遗传差异较大,表明形态特征的相似与亲缘关系的远近并无直接联系。Partial sequences of 12S rRNA gene of eight snappers collected in coastal waters of china determined in the present study and two lutjanid sequences downloaded from GenBank were combined to reconstruct Maximum likelihood and Bayesian inference trees with Siganus unimaculatus,S.fuscescens,Monotaxis grandoculis,Lethrinus obsoletus（perciformes）,Myripristis berndti,Beryx splendens,Sargocentron rubrum（Beryciformes）,and Danio rerio（Cypriniformes） as outgroups.Totally 170 variable sites and 126 parsimony-informative sites existed in the 895 bp sequences,and the ts/tv ratio was 2.39.Phylogenetic trees showed that the Caesioninae were nested within the Lutjaninae,supporting the recent opinion that the Caesionidae shoud be regarded as a synonym of the Lutjanidae,but their phylogenetic relationships to other lutjanid species remained to be further studied.L.malabarius and L.sebae formed a well-supported clade,supporting the taxonomical treatment of L.malabarius and L.sebae based on morphological characters;however morphologically similar species L.johni and L.argentimaculatus were genetically quite different,indicating that morphologically similar species were not necessarily genetically closely related.

关 键 词：笛鲷科(Lutjanidae) 马拉巴笛鲷(Lutjanidae malabaricus) MTDNA 12S rRNA 系统发育 

分 类 号：Q959.483[生物学—动物学]