Cleavage patterns and gastrulation as complex characters for phylogenetic inferences in the Metazoa: the early development of Rotifera (II) and Kinorhyncha

卵裂模式和原肠胚形成作为后生动物系统发育推断的复杂特征：轮虫纲 (II) 和动喙纲的早期发展

• 批准号: 5452223
• 负责人: Professor Dr. Gerhard Scholtz
• 金额: --
• 依托单位: Arbeitsgruppe Vergleichende Zoologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5452223?language=en
• 关键词: Cleavage; patterns; gastrulation; complex; characters

The analysis of early ontogenetic stages can contribute to the resolution of metazoan phylogenetic relationships. Here we address two questions. One is whether the Rotifera show spiral cleavage or traces thereof as is suggested by the Lophotrochozoa/Spiralia hypothesis or whether they show a cleavage type which is more related to that of Cycloneuralia. The second question deals with the early development of Kinorhyncha and its contribution to the reconstruction of the ancestral ecdysozoan cleavage pattern. Our knowledge about the cleavage pattern and the gastrulation of both groups is still fragmentary. To fill these gaps we want to study the early cleavage patterns, the cell lineages, the cell fates, and the gastrulation modes of representatives of Rotifera and Kinorhyncha in great detail with a variety of methods ranging from histology to 4D-microscopy. Our results will be compared with available data from the literature. In collaboration with the “Deep Metazoan Phylogeny” network, the developmental characters will be defined, conceptualised, fed into a comprehensive morphological data matrix, and eventually used to analyse metazoan phylogenetics.

对早期个体发育阶段的分析有助于解决后生动物的系统发育关系。在这里，我们要回答两个问题。第一个问题是轮虫是否如Lophotrochozoa/Spiralia假说所暗示的那样显示出螺旋卵裂或其踪迹，或者它们是否显示出与环神经纲更相关的卵裂类型。第二个问题涉及Kinorhyncha的早期发展及其对重建祖先蜕皮动物卵裂模式的贡献。我们对这两个群体的卵裂模式和原肠形成的了解仍然是零碎的。为了填补这些空白，我们希望用从组织学到4D显微镜的各种方法，非常详细地研究轮虫和动轮藻属代表的早期卵裂模式、细胞谱系、细胞命运和原肠形成模式。我们的结果将与文献中的现有数据进行比较。与“深部后生动物系统发育网络”合作，将对发育特征进行定义、概念化，输入一个全面的形态数据矩阵，并最终用于分析后生动物的系统发育。