Generic and subtribal relationships in Neotropical Cymbidieae (Orchidaceae) based on matK/ycf1 plastid data

Relationships among all subtribes of Neotropical Cymbidieae (Orchidaceae) were estimated using combined matK/ycf1 plastid sequence data for 289 taxa. The matrix was analyzed using RAxML. Bootstrap (BS) analyses yield 100% BS support for all subtribes except Stanhopeinae (87%). Generic relationships within subtribes are highly resolved and are generally congruent with those presented in previous studies and as summarized in Genera Orchidacearum. Relationships among subtribes are largely unresolved. The Szlachetko generic classification of Maxillariinae is not supported. A new combination is made for Maxillaria cacaoensis J.T.Atwood in Camaridium.

本研究基于289个类群的matK/ycf1质体联合序列数据，对兰科（Orchidaceae）新热带兰族（Neotropical Cymbidieae）所有亚族间的系统发育关系进行了推断。采用RAxML软件对该序列矩阵开展系统发育分析。自举（Bootstrap，BS）支持率分析结果显示，除吊桶兰亚族（Stanhopeinae）的BS支持率为87%外，其余所有亚族均获得100%的BS支持。各亚族内部的属间亲缘关系得到高度解析，且整体与既往研究及《兰科属》（Genera Orchidacearum）中总结的结论一致。亚族间的系统发育关系在很大程度上仍未得到有效解析。Szlachetko提出的颚唇兰亚族（Maxillariinae）属级分类方案未得到本研究结果的支持。本研究将Maxillaria cacaoensis J.T.Atwood新组合至Camaridium属中。