Gilliesieae are a South American tribe of Amaryllidaceae characterized by high floral diversity. Given different taxonomic interpretations and proposals for generic and specific relationships, a representative phylogenetic analysis is required to clarify the systematics of this group. The present study provides a framework for understanding phylogenetic relationships and contributing to the development of an appropriate taxonomic treatment of Gilliesieae. Molecular analyses, based on nuclear (ITS) and plastid DNA sequences (trnL-F and rbcL), resolve with strong support the monophyly of the tribe and the differentiation of two major clades. Clade I comprises the genera Gilliesia, Gethyum and Solaria and Clade II includes Miersia and Speea. These well-supported clades are mostly congruent with vegetative and karyotype characters rather than, e.g., floral symmetry. At the generic level, all molecular analyses reveal the paraphyly of Gilliesia and Miersia. Gethyum was found to be paraphyletic, resulting in the confirmation of Ancrumia as a distinct genus. Several instances of incongruent phylogenetic signals were found among data sets. The calibrated tree suggests a recent diversification of the tribe (Pliocene–Pleistocene), a contemporary process of speciation in which instances of hybridization and incomplete lineage sorting could explain patterns of paraphyly and incongruence of floral morphology.

中文翻译：

---

基于核和质体DNA序列的系统发生关系揭示了智利Gilliesieae（Amaryllidaceae：Allioideae）属最近的多样化和形态进化的不一致模式。

Gilliesieae是南美金枪鱼科的一个部落，其特征是花的多样性高。给定不同的分类学解释和对通用和特定关系的建议，需要进行代表性的系统进化分析以阐明该组的系统学。本研究提供了一个框架，以了解系统发育的关系，并有助于开发适当的分类学的Gilliesieae。基于核（ITS）和质体DNA序列（trnL-F和rbcL）的分子分析，在部落的单方面性和两个主要进化枝的分化的强大支持下得以解析。Clade I包括Gilliesia，Gethyum和Solaria属，而Clade II包括Miersia和Speea。这些支撑良好的进化枝大多与营养和核型特征一致，而不是例如花的对称性。在一般水平上，所有分子分析都揭示了吉利西亚和密尔西亚的副植物。Gethyum被发现具有寄生性，从而确认Ancrumia是一个独特的属。在数据集中发现了几个不一致的系统发育信号实例。经过校准的树表明该部落最近发生了多样化（上新世至更新世），这是当代的物种形成过程，在该过程中，杂交和不完整的谱系排序实例可以解释似草的模式和花卉形态的不一致。