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.

异鳃腹足纲（软体动物）由一个异质类群组成，主要是陆生类群（肺类），但也有许多不同的海洋类群，包括最大的海洋类群裸鳃类，至少有 4,000 种。在裸鳃亚纲中，通常区分两个单系亚群：Euctenidiacea (= Anthobranchia) 和 Dexiarchia (Cladobranchia + Doridoxa)。 Dexiarchia 包含至少 2,000 个物种，还有许多其他物种尚未描述。目前已识别34科近100属。不存在包含所有主要科的 Dexiarchia 的系统发育分析并证实该组内的关系。我们希望通过利用已提取的 DNA 和保存的材料来富集单拷贝蛋白质编码基因的靶 DNA，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为研究这个具有非凡生物现象的高度多样化群体的进化奠定基础。这将是第一次将分子标记和形态特征这两种技术结合起来，以帮助解决我们目前对海洋异分支进化的理解中的一些不一致之处。