Mitochondrial genome of Pogona vitticepes (Reptilia; Agamidae):: control region duplication and the origin of Australasian agamids
Mitochondrial genome of Pogona vitticepes (Reptilia; Agamidae):: control region duplication and the origin of Australasian agamids
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DOI：
10.1016/j.gene.2004.11.014
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发表时间：
2005-02-14
期刊：
影响因子：
3.5
通讯作者：
Kumazawa, Y
中科院分区：
文献类型：
--
作者：
Amer, SAM;Kumazawa, Y
测定了一种澳大利亚无杂交体Pogona vitticepes的全线粒体DNA序列。在线粒体基因组中鉴定出22个tRNA基因、2个rRNA基因、13个蛋白编码基因和2个控制区。第二个控制区插入NADH脱氢酶亚基5和6基因之间。对照区重复在所有的大洋洲菊科植物中均有发现，而在其他亚洲和非洲分类群中未发现。两个控制区在种内序列基本一致，但在种间存在差异，表明它们的序列进化是一致的。系统发育分析，包括在没有假设分子钟的情况下进行的分化时间估计，表明控制区的重复发生在2.45亿年前的一个谱系上，该谱系导致了Australasian agamids与东南亚Physignathus coccinus的分化。因此，我们的发现支持了澳大利亚菊科植物最近的分散起源，这与澳大利亚向东南亚附近的板块构造运动有关。(c) 2004 Elsevier B.V.版权所有
The complete mitochondrial DNA sequence for an Australian agamid Pogona vitticepes was determined. Twenty-two tRNA genes, two rRNA genes, thirteen protein-coding genes, and two control regions were identified in this mitochondrial genome. The second control region was inserted between NADH dehydrogenase subunits 5 and 6 genes. The duplication of the control region was found in all Australasian agamids examined and was not found in other Asian or African taxa. The two control regions had nearly identical sequences within species but they were divergent among species, suggesting their concerted sequence evolution. Phylogenetic analyses including divergence time estimation without assuming the molecular clock suggested that the duplication of the control region occurred on a lineage leading to the Australasian agamids 2545 million years ago after their divergence from a Southeast Asian Physignathus cocincinus. Our finding thus supports the recent dispersal origin of Australasian agamids in connection with plate tectonic movement of Australia to the proximity of Southeast Asia. (c) 2004 Elsevier B.V. All rights reserved.