Mitochondrial genomes of acrodont lizards: timing of gene rearrangements and phylogenetic and biogeographic implications.
Mitochondrial genomes of acrodont lizards: timing of gene rearrangements and phylogenetic and biogeographic implications.
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DOI：
10.1186/1471-2148-10-141
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发表时间：
2010-05-13
影响因子：
3.4
通讯作者：
Kumazawa Y
中科院分区：
文献类型：
--
作者：
Okajima Y;Kumazawa Y
肩齿目由蛇齿科和变色龙科组成，具有典型的齿形特征。这两个科和鬣蜥科是下目鬣蜥的成员。尽管进行了大量形态学和分子生物学的研究，但鬣蜥的系统发育关系和历史生物地理学仍有待阐明。通过对代表肢齿蜥蜴主要谱系的10个物种的全线粒体基因组进行测序，解决了这个问题。本研究也为比较不同鬣蜥谱系间有丝分裂基因组的分子进化模式提供了良好的机会。Acrodontan有丝分裂基因组在基因排列特征和序列进化速度方面不如鬣蜥保守。利用有丝分裂基因组序列数据构建系统发育关系，并据此推断基因重排的时间。结果表明，除了tRNAPro基因从控制区的5‘侧易位到3’侧易位外，几种基因重排的发生具有高度的谱系特异性，这可能单独发生在agamine和变色龙谱系中。系统发育分析表明，变色龙科与变色龙科之间存在单系关系，而传统的变色龙属与变色龙科之间存在非单系关系。Uromastyx和Brookesia分别被认为是Agamidae和Chamaeleonidae最早的分支。结合松弛时钟测年的结果，我们的分子系统发育被用来推断Acrodonta的起源及其后代谱系的历史生物地理。我们的分子数据倾向于Acrodonta的冈瓦纳起源，Agamidae和Chamaeleonidae在印度-马达加斯加大陆漂移中发生了代分化，以及Agamidae随着印度次大陆迁移到欧亚大陆，尽管没有严格排除Acrodonta的Laurasian起源。我们在不同的鬣蜥家族中发现了不同的有丝分裂基因组进化模式。Agamidae强调包括一些谱系特异性线粒体基因重排。有丝分裂基因组的数据提供了一定程度的分辨率，重建系统发育的acrodontan，尽管仍然有模棱两可的关系。我们的生物地理学意义通过增加一些新的证据和具体内容，阐明了先前关于齿齿纲起源于冈瓦纳人的假设。
Acrodonta consists of Agamidae and Chamaeleonidae that have the characteristic acrodont dentition. These two families and Iguanidae sensu lato are members of infraorder Iguania. Phylogenetic relationships and historical biogeography of iguanian lizards still remain to be elucidated in spite of a number of morphological and molecular studies. This issue was addressed by sequencing complete mitochondrial genomes from 10 species that represent major lineages of acrodont lizards. This study also provided a good opportunity to compare molecular evolutionary modes of mitogenomes among different iguanian lineages. Acrodontan mitogenomes were found to be less conservative than iguanid counterparts with respect to gene arrangement features and rates of sequence evolution. Phylogenetic relationships were constructed with the mitogenomic sequence data and timing of gene rearrangements was inferred on it. The result suggested highly lineage-specific occurrence of several gene rearrangements, except for the translocation of the tRNAPro gene from the 5' to 3' side of the control region, which likely occurred independently in both agamine and chamaeleonid lineages. Phylogenetic analyses strongly suggested the monophyly of Agamidae in relation to Chamaeleonidae and the non-monophyly of traditional genus Chamaeleo within Chamaeleonidae. Uromastyx and Brookesia were suggested to be the earliest shoot-off of Agamidae and Chamaeleonidae, respectively. Together with the results of relaxed-clock dating analyses, our molecular phylogeny was used to infer the origin of Acrodonta and historical biogeography of its descendant lineages. Our molecular data favored Gondwanan origin of Acrodonta, vicariant divergence of Agamidae and Chamaeleonidae in the drifting India-Madagascar landmass, and migration of the Agamidae to Eurasia with the Indian subcontinent, although Laurasian origin of Acrodonta was not strictly ruled out. We detected distinct modes of mitogenomic evolution among iguanian families. Agamidae was highlighted in including a number of lineage-specific mitochondrial gene rearrangements. The mitogenomic data provided a certain level of resolution in reconstructing acrodontan phylogeny, although there still remain ambiguous relationships. Our biogeographic implications shed a light on the previous hypothesis of Gondwanan origin of Acrodonta by adding some new evidence and concreteness.
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影响因子：
3.5
作者：
Albert, Eva M.;San Mauro, Diego;Zardoya, Rafael
通讯作者：
Zardoya, Rafael
影响因子：
3.5
作者：
Amer, SAM;Kumazawa, Y
通讯作者：
Kumazawa, Y
DOI：
10.1098/rspb.2000.1402
发表时间：
2001-03-22
影响因子：
4.7
作者：
Janke, A;Erpenbeck, D;Arnason, U
通讯作者：
Arnason, U
影响因子：
3.5
作者：
Boehme, M. U.;Fritzsch, G.;Berendonk, T. U.
通讯作者：
Berendonk, T. U.
影响因子：
1.6
作者：
HOFMAN A;MAXSON L R;ARNTZEN J W
通讯作者：
ARNTZEN J W