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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Globally intertwined evolutionary history of giant barrel sponges
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Globally intertwined evolutionary history of giant barrel sponges

机译：全球交织巨型桶形海绵的进化史

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Three species of giant barrel sponge are currently recognized in two distinct geographic regions, the tropical Atlantic and the Indo-Pacific. In this study, we used molecular techniques to study populations of giant barrel sponges across the globe and assessed whether the genetic structure of these populations agreed with current taxonomic consensus or, in contrast, whether there was evidence of cryptic species. Using molecular data, we assessed whether giant barrel sponges in each oceanic realm represented separate monophyletic lineages. Giant barrel sponges from 17 coral reef systems across the globe were sequenced for mitochondrial (partial CO1 and ATP6 genes) and nuclear (ATPs beta intron) DNA markers. In total, we obtained 395 combined sequences of the mitochondrial CO1 and ATP6 markers, which resulted in 17 different haplotypes. We compared a phylogenetic tree constructed from 285 alleles of the nuclear intron ATPs beta to the 17 mitochondrial haplotypes. Congruent patterns between mitochondrial and nuclear gene trees of giant barrel sponges provided evidence for the existence of multiple reproductively isolated species, particularly where they occurred in sympatry. The species complexes in the tropical Atlantic and the Indo-Pacific, however, do not form separate monophyletic lineages. This rules out the scenario that one species of giant barrel sponge developed into separate species complexes following geographic separation and instead suggests that multiple species of giant barrel sponges already existed prior to the physical separation of the Indo-Pacific and tropical Atlantic.
机译：目前在两个不同的地理区域，热带大西洋和印度太平洋的三种巨型枪管海绵。在这项研究中，我们使用了分子技术来研究全球巨型桶形海绵的群体，并评估这些人群的遗传结构是否同意当前的分类分类共识，或者相反，是否存在隐秘物种的证据。使用分子数据，我们评估了每个海洋领域的巨型桶海绵是否代表了单独的单晶体谱系。来自全球的17个珊瑚礁系统的巨型桶海绵被测序，用于线粒体（部分CO1和ATP6基因）和核（ATPβ内含子）DNA标记。总共获得了395个线粒体CO1和ATP6标记的组合序列，导致17种不同的单倍型。与核发育树进行比较从285个核科学内ATPβ到17个线粒体的单倍型。巨型桶海绵的线粒体和核基因树之间的一致性模式为存在多种生殖孤立的物种提供了证据，特别是在Sympatry中发生的地方。然而，热带大西洋和印度太平洋地区的物种复合物不形成单独的单晶体谱系。这条规定了在地理分离后开发成单独物种复合物的一个种类巨型桶形海绵的场景，而是建议在印度 - 太平洋和热带大西洋物理分离之前已经存在多种巨型枪管海绵。

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