Fine-scale morphological, genomic, reproductive, and symbiont differences delimit the Caribbean octocorals Plexaura homomalla and P. kükenthali
Fine-scale morphological, genomic, reproductive, and symbiont differences delimit the Caribbean octocorals Plexaura homomalla and P. kükenthali
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精细的形态、基因组、生殖和共生差异界定了加勒比八珊瑚 Plexaurahomomalla 和 P. kükenthali
DOI：
10.1007/s00338-021-02175-x
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发表时间：
2021
期刊：
影响因子：
3.5
通讯作者：
Lasker, Howard
中科院分区：
文献类型：
--
作者：
Pelosi, Jessie A.;Bernal, Moisés A.;Krabbenhoft, Trevor J.;Galbo, Samantha;Prada, Carlos;Coffroth, Mary Alice;Lasker, Howard
珊瑚虫是珊瑚礁和深海生态系统的重要成员。然而，这一群体内的物种界限和分类关系仍然知之甚少，阻碍了我们对海洋动物群这一重要组成部分的了解。我们使用了多方面的方法来重新审视的系统学的加勒比海珊瑚Plexaura homomallaandPlexaura kükenthali，两个分类群，有一个悠久的历史的分类修订。我们将形态学和生殖分析与高通量测序技术相结合，以澄清这些常见柳珊瑚之间的关系。虽然骨片的大小和形状是显着不同的，有重叠的分布，使单独基于骨片识别困难。生殖时间和幼虫发育模式的差异进行了检测，这表明前合子隔离的可能机制。此外，有显着的遗传差异和明确的分离，这两个物种的核内含子和单核苷酸多态性获得的新组装的转录组。尽管存在这些差异，但SNP分析表明，两组之间仍然可能存在杂交。这两个新生的物种也不同的共生体社区（genusBreviolum）在加勒比地区的多个采样点。尽管有复杂的历史分类修订，我们的研究结果支持的分化。homomalla和P. kükenthali，强调综合方法是必要的珊瑚虫系统学。
Octocorals are conspicuous members of coral reefs and deep-sea ecosystems. Yet, species boundaries and taxonomic relationships within this group remain poorly understood, hindering our understanding of this essential component of the marine fauna. We used a multifaceted approach to revisit the systematics of the Caribbean octocoralsPlexaura homomallaandPlexaura kükenthali,two taxa that have a long history of taxonomic revisions. We integrated morphological and reproductive analyses with high-throughput sequencing technology to clarify the relationship between these common gorgonians. Although size and shape of the sclerites are significantly different, there is overlap in the distributions making identification based on sclerites alone difficult. Differences in reproductive timing and mode of larval development were detected, suggesting possible mechanisms of pre-zygotic isolation. Furthermore, there are substantial genetic differences and clear separation of the two species in nuclear introns and single-nucleotide polymorphisms obtained fromde novoassembled transcriptomes. Despite these differences, analyses with SNPs suggest that hybridization is still possible between the two groups. The two nascent species also differed in their symbiont communities (genusBreviolum) across multiple sampling sites in the Caribbean. Despite a complicated history of taxonomic revisions, our results support the differentiation ofP. homomallaandP. kükenthali,emphasizing that integrative approaches are essential for Anthozoan systematics.
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影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
48
作者：
Langmead, Ben;Salzberg, Steven L.
通讯作者：
Salzberg, Steven L.
影响因子：
4.9
作者：
Prada, Carlos;Mcilroy, Shelby E.;Coffroth, Mary Alice
通讯作者：
Coffroth, Mary Alice
影响因子：
2.6
作者：
Bastidas, C;Cróquer, A;Márquez, LM
通讯作者：
Márquez, LM
影响因子：
3.7
作者：
Velásquez J;Sánchez JA
通讯作者：
Sánchez JA