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郑渝池, 莫邦辉, 刘志君, 曾晓茂. 2004: 基于16 S rRNA序列的角蟾科部分属间系统关系. 动物学研究, 25(3): 205-213.
引用本文: 郑渝池, 莫邦辉, 刘志君, 曾晓茂. 2004: 基于16 S rRNA序列的角蟾科部分属间系统关系. 动物学研究, 25(3): 205-213.
ZHENG Yu-chi, MO Bang-hui, LIU Zhi-jun, ZENG Xiao-mao. 2004. Phylogenetic Relationships of Megophryid Genera (Anura:Megophryidae) Based on Partial Sequences of Mitochondrial 16 S rRNA Gene. Zoological Research, 25(3): 205-213.
Citation: ZHENG Yu-chi, MO Bang-hui, LIU Zhi-jun, ZENG Xiao-mao. 2004. Phylogenetic Relationships of Megophryid Genera (Anura:Megophryidae) Based on Partial Sequences of Mitochondrial 16 S rRNA Gene. Zoological Research, 25(3): 205-213.

基于16 S rRNA序列的角蟾科部分属间系统关系

Phylogenetic Relationships of Megophryid Genera (Anura:Megophryidae) Based on Partial Sequences of Mitochondrial 16 S rRNA Gene

  • 摘要: 采用最大似然法(ML法)、最大简约法(MP法)、邻接法(NJ法)对来自角蟾科Megophryidae (Anura)8属17种及外群2种共25条400 bp左右的线粒体16 S rRNA序列进行系统发育关系分析。结果表明,用于分析的所有角蟾科物种形成两大支,第一支包括Megophrys,Brachytarsophrys和Atympanophrys,第二支包括Leptobrachium,Leptolalax,Scutiger,Oreolalax和Vibrissaphora。支持将角蟾科划分为两大类群,即第一支属于Megophryini族,第二支属于Leptobrachiini族。根据分子钟模型初步推测两类群间的分歧时间大致为14.2—18.7百万年前。在Megophryini族中,基因树的拓扑结构不支持Atympanophrys建立后的Megophrys为单系;而在Leptobrachiini族中,Leptolalax为一有效属,其系统发生较早。

     

    Abstract: Phylogenetic relationships of 8 genera of Megophryidae (Anura) were discussed based on 25 partial sequences of mitochondrial 16 S rRNA gene.Maximum likelihood,maximum parsimony,and neighbor joining analyses were performed on the dataset.The ingroup was divided into two major clades,Clade 1 and Clade 2,on the gene tree.Clade 1 included Megophrys,Brachytarsophrys and Atympanophrys,while Leptolalax,Oreolalax,Scutiger,Leptobrachium and Vibrissaphora belonged to Clade 2.This met the result of morphological study.It was primarily estimated that the divergence age of two clades occurred 14.2-18.7 million years ago.The topology of Clade 1 did not support Megophrys to be a monophyletic group.In Clade 2,Leptolalax was believed to be a valid genus and was the taxon that occurred much early.

     

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