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Combining target DNA enrichment and morphology to understand the evolution of Dexiarchia (Nudibranchia, Heterobranchia, Gastropoda, Mollusca)

结合目标 DNA 富集和形态学来了解 Dexiarchia（裸鳃亚纲、异鳃纲、腹足纲、软体动物）的进化

基本信息

批准号：
384170056
负责人：
Dr. Alexander Donath
金额：
--
依托单位：
Zentrum für Molekulare Biodiversitätsforschung (zmb)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/384170056?language=en
关键词：
Combining target DNA enrichment morphology

项目摘要

Heterobranch Gastropoda (Mollusca), comprise a heterogeneous group of predominantly terrestrial forms (Pulmonata), but also with many different marine taxa, including the biggest marine group, the Nudibranchia, with at least 4,000 species. Within the Nudibranchia, two monophyletic subtaxa are generally distinguished: Euctenidiacea (= Anthobranchia) and Dexiarchia (Cladobranchia + Doridoxa). Dexiarchia comprises at least 2,000 species with many additional species still undescribed. Currently, 34 families with nearly 100 different genera are recognized. There exist no phylogenetic analyses of Dexiarchia that comprises all major families and corroborates relationships within this group. We want to investigate this long standing problem by exploiting already extracted DNA and preserved material for target DNA enrichment of single-copy protein-coding genes and combining the results with morphological analyses. Resulting phylogenetic hypotheses will form the base for the investigation of the evolution of this highly diverse group with extraordinary biological phenomena. It will be the first time that both techniques - molecular markers and morphological features - will be combined to help resolving some of the incongruences in our current understanding of marine heterobranch evolution.

异鳃腹足类（软体动物），包括一个主要陆地形式（肺）的异质组，但也有许多不同的海洋类群，包括最大的海洋类群，裸鳃亚目，至少有4,000个物种。在裸鳃亚目中，通常区分两个单系亚分类群：Eutenidiacea（= Anthobranchia）和Dexiarchia（Cladobranchia + Doridoxa）。Dexiarchia包括至少2，000个物种，还有许多其他物种尚未描述。目前，已确认的有34个科，近100个不同属。目前还没有Dexiarchia的系统发育分析，包括所有主要的家庭，并证实了这组内的关系。我们希望通过利用已经提取的DNA和保存的材料进行单拷贝蛋白质编码基因的靶DNA富集并将结果与形态学分析相结合来研究这个长期存在的问题。由此产生的系统发育假说将形成这个高度多样化的群体与非凡的生物现象的进化调查的基础。这将是第一次，这两种技术-分子标记和形态特征-将结合起来，以帮助解决我们目前对海洋异鳃类进化的理解中的一些不一致。