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首页> 外文期刊>Marine biology >Genetic connectivity among color morphs and Pacific archipelagos for the flame angelfish, Centropyge loriculus
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Genetic connectivity among color morphs and Pacific archipelagos for the flame angelfish, Centropyge loriculus

机译：火焰神仙鱼（Centropyge loriculus）颜色形态与太平洋群岛之间的遗传连通性

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摘要

Color variation is used in taxonomic classification of reef fishes, but it may not reliably indicate evolutionary divergence. In the central Pacific, there are three color morphs of the flame angelfish, Centropyge loriculus: a red morph that occurs primarily in the Hawaiian archipelago, the endemic Marquesan color morph with reduced black markings, and an orange morph that occurs throughout the rest of Oceania. The red and orange morphs co-occur at Johnston Atoll (1,300 km south of Hawai'i), but intermediate forms have not been reported. To determine whether the three color morphs represent distinct evolutionary lineages, we compared 641 base pairs of mitochondrial cytochrome b. Forty-one closely related haplotypes were observed in 116 individuals. Analysis of molecular variance (AMOVA) indicated no significant genetic structure among color morphs (Φ_(ST) = 0.011, P = 0.147). Likewise, there was no significant pairwise structure between sampling locations, separated by up to 5,700 km, after a Bonferroni correction (Φ_(ST) = 0.000-0.080, P = 0.0130-0.999). Genetic studies in conjunction with larval distribution data indicate that Centropyge species are highly dispersive. While there is a strong geographic component to the distribution of color morphs in C. loriculus, we find no evidence for corresponding genetic partitioning. We do not rule out an adaptive role for color differentiation, but our data do not support emerging species.
机译：颜色变化用于礁鱼的分类学分类，但可能无法可靠地表明进化差异。在太平洋中部，火焰神仙鱼（Centropyge loriculus）有三种颜色变体：一种红色变体，主要发生在夏威夷群岛；一种特有的Marquesan颜色变体，黑色斑纹减少；一个橙色变体，遍及整个大洋洲。 。红色和橙色形态同时出现在约翰斯顿环礁（夏威夷以南1300公里处），但尚未报道中间形态。为了确定这三种颜色是否代表不同的进化谱系，我们比较了线粒体细胞色素b的641个碱基对。在116个人中观察到41个紧密相关的单倍型。分子方差分析（AMOVA）表明颜色形态之间没有显着的遗传结构（Φ_（ST）= 0.011，P = 0.147）。同样，在Bonferroni校正后，采样位置之间没有明显的成对结构，相隔最多5700 km（Φ_（ST）= 0.000-0.080，P = 0.0130-0.999）。遗传研究与幼虫分布数据一起表明，Centropyge物种高度分散。虽然在色环线虫中颜色形态的分布具有很强的地理成分，但我们没有发现相应的遗传分区的证据。我们不排除颜色差异的适应性作用，但我们的数据不支持新兴物种。

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