Gérard Karin, Roby Charlotte, Chevalier Nicolas, Thomassin Bernard, Chenuil Anne, Féral Jean-Pierre
Université de la Méditerranée, centre d'océanologie de Marseille, station marine d'Endoume, chemin de la Batterie-des-Lions, 13007 Marseille, France.
C R Biol. 2008 Feb;331(2):137-43. doi: 10.1016/j.crvi.2007.11.005. Epub 2007 Dec 21.
Acanthaster planci (L.) is one of the major threats to coral reefs, whose genetic diversity has been mainly studied with allozymes. Allozymes revealed the low genetic differentiation between A. planci populations in the Indo-Pacific area. We obtained sequences of A. planci from Kenya, Mayotte and Madagascar at the three loci cytochrome oxydase subunit I (COI), 16S rDNA (16S) and five tRNAs, analysed together with available sequences of Acanthaster from the Pacific Ocean. The level of genetic diversity varied among the three loci, tRNAs being on average three times less divergent than COI and 16S genes. The genus Acanthaster appeared monophyletic, the two species A. brevispinus (Fisher) and A. planci forming distinct clades in agreement with data from morphology and systematics. The A. planci clade split into a West Indian Ocean group and a Pacific group, in agreement with allozyme data on population differentiation.
棘冠海星（Acanthaster planci (L.)）是对珊瑚礁的主要威胁之一，其遗传多样性主要通过等位酶进行研究。等位酶揭示了印度-太平洋地区棘冠海星种群之间较低的遗传分化。我们获得了来自肯尼亚、马约特岛和马达加斯加的棘冠海星在细胞色素氧化酶亚基I（COI）、16S核糖体DNA（16S）和五个转运RNA这三个基因座的序列，并与来自太平洋的棘冠海星的现有序列一起进行了分析。三个基因座的遗传多样性水平各不相同，转运RNA的平均分歧程度比COI和16S基因小三倍。棘冠海星属呈现出单系性，短棘棘冠海星（A. brevispinus (Fisher)）和棘冠海星这两个物种形成了不同的分支，这与形态学和系统学数据一致。棘冠海星分支分为西印度洋组和太平洋组，这与关于种群分化的等位酶数据一致。
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