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首页> 外文期刊>The Korean Journal of Systematic Zoology >Molecular Phylogeny and Divergence Time Estimation of the Soft Coral Dendronephthya gigantea (Alcyonacea: Nephtheidae)
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Molecular Phylogeny and Divergence Time Estimation of the Soft Coral Dendronephthya gigantea (Alcyonacea: Nephtheidae)

机译：软珊瑚Dendronephthya gigantea（Alcyonacea：Nephtheidae）的分子系统发育和发散时间估计。

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摘要

Soft coral Dendronephthya gigantea (Verrill, 1864) is a conspicuous species dominating shallow sea waters of Jejudo Island, Korea. Recently its whole mitochondrial genome sequencing was completed by us and the sequence information provided an opportunity to test the age of Octocorallia and time of evolutionary separation between some representative orders of the subclass Octocorallia. Molecular phylogenetic analyses based on 13 mitochondrial protein encoding genes revealed a polyphyletic relationship among octocorallians representing, two orders (Alcyonacea and Gorgonacea) and four families (Alcyoniidae, Nephtheidae, Briareidae, and Gorgoniidae). Estimates of divergence times among octocorallians indicate that the first splitting might Occur around end of or after Cretaceous period (50-79 million years ago (Ma)). The age is relatively young compared to the long history of stony sea corals (>240 Ma). Taken together our result Suggests a possible relatively recent radiating evolution at least in the order Alcyonacea and Gorgonacea. Molecular dating and phylogenetic analysis based on much broader taxon sampling and many genes might give an insight into this interesting hypothesis.
机译：软珊瑚Dendronephthya gigantea（Verrill，1864年）是一种显着的物种，在韩国济州岛的浅海水域中占主导地位。最近，我们完成了其完整的线粒体基因组测序，序列信息提供了一个机会来检验八倍体的年龄和八倍体亚类的一些代表性顺序之间的进化分离时间。基于13个线粒体蛋白编码基因的分子系统发育分析表明，代表八阶的八足纲动物（Alcyonacea和Gorgonacea）和四个科（Alcyoniidae，Nephtheidae，Briaeidae和Gorgoniidae）之间存在多系关系。八角珊瑚之间的分歧时间估计表明，第一次分裂可能发生在白垩纪时期（50-79百万年前（马））前后。与石质海珊瑚的悠久历史（> 240 Ma）相比，这个年龄相对年轻。综上所述，我们的结果表明至少在Alcyonacea和Gorgonacea顺序中可能存在相对近期的辐射演化。基于更广泛的分类单元采样和许多基因的分子测年和系统发育分析可能会为这个有趣的假设提供一个见识。

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