基于部分线粒体DNA序列的疣螈属亚属(有尾目,蝾螈科,疣螈属)系统发育关系

PHYLOGENETIC RELATIONSHIPS OF SUBGENUS YAOTRITON(CAUDATA, SALAMANDRIDAE, TYLOTOTRITON) BASED ONPARTIAL MITOCHONDRIAL DNA GENE SEQUENCES

对疣螈属Yaotriton亚属5个已知物种23个个体的mtDNA序列数据(ND2、tRNATrp、tRNAAla、tRNAAsn、tRNACys和tRNA Tyr,1421bp),使用贝叶斯(BI)和最大似然(M P)方法重建了疣螈属Yaotriton的系统发育关系。结果表明:1)Yaotriton亚属的所有物种形成1个单元群;2)海南疣螈T.hainanensis是Yaotriton亚属的1有效物种,不是细痣疣螈T.asperrimus的同物异名;3)文县疣螈T.wenxianensis雷山种群应是细痣疣螈的地理种群,细痣疣螈绥阳种群应是文县疣螈的地理种群;4)6个文县疣螈地理种群和3个细痣疣螈地理种群分别形成单系群,文县疣螈是Yaotriton亚属的1有效物种。

We examine phylogenetic relationships among the subgenus Yaotriton using mtDNA sequence data （the ND2, tRNATrp, tRNAAla, tRNAAsn, tRNACys and tRNATyr, 1 421 bp） collected from 23 individuals representing 5 recognized species by Bayesian inference （BI） and Maximum parsimony （MP） methods. The main results are： 1） all species of the subgenus Yaotriton formed a monophyletic group; 2） T. hainanensis is a valid species in the subgenus Yaotriton, is not a synonymy of T. asperrimus; 3） T. wenxianensis （Leishan population） and T. asperrimus （Suiyang population） should be a geographical population of T. asperrimus and T. wenxianensis, respectively; 4） six geographical populations T. wenxianensis and three geographical populations of T. asperrimus form a monophyletic groups, respectively, T. wenxianensis is a valid species in the subgenus Yaotriton.