The introduction history and phylogenetic relationships of Passiflora foetida sensu lato in Australia. Passiflora in Australia

Here we use a whole chloroplast sequencing approach to assess the phylogenetic relationship between multiples accessions of P. foetida s. l. in order to identify the lineage(s) present in the introduced range in Australia and their most likely source area(s) in the native range in Central and South America. We also use the same approach to confirm the phylogenetic position of P. foetida s. l. amongst all taxa of Passiflora ─ native and non-native (including both commercial varieties and naturalised species) ─ that are present in Australia. Specifically, we sought (1) to determine whether the presence of P. foetida s. l. in Australia is the result of a single or multiple introductions; (2) to identify the source of the introduction(s) and any evolutionary divergence between the native range and Australian range; and (3) to determine the phylogenetic relationship between the introduced lineages and any other co-occurring Passiflora species.

本研究采用全叶绿体测序（whole chloroplast sequencing）技术，对广义臭西番莲（Passiflora foetida sensu lato，P. foetida s. l.）的多个种质样本开展系统发育关系（phylogenetic relationship）分析，旨在明确其在澳大利亚引入分布区内存在的演化支系，以及各支系在中、南美洲原生分布区中的最可能来源区域。本研究同时采用相同实验方法，确定广义臭西番莲在澳大利亚境内所有西番莲属（Passiflora）分类群（taxon）中的系统发育位置，涵盖该区域内的本土物种与外来类群，包括商业品种及归化物种。具体而言，本研究旨在达成以下三项研究目标：（1）明确澳大利亚境内广义臭西番莲的分布是否源于单次或多次引种事件；（2）确定引种事件的来源区域，以及原生分布区与澳大利亚分布区之间的演化分化水平；（3）明确该引入演化支系与澳大利亚境内其他伴生西番莲属物种之间的系统发育关系。