基于trnL-F序列数据利用贝叶斯法推测罗汉松科的系统发育

Bayesian Inference of the Phylogeny of Podocarpaceae Based on trnL-F Sequence Data

以黑松和Agathisaustralis为外类群,基于罗汉松科42种植物的叶绿体trnL＿F序列数据通过贝叶斯法对该科的系统发育进行了推测。结果显示:①Phyllocladus为单系分支,位于罗汉松科的基部,是罗汉松科所有其余成员的姊妹群;②Nageia嵌套在罗汉松科内,同罗汉松属、Afrocarpus及Retrophyllum的关系较为密切;③Dacrycarpus为单系群且处于姊妹分支Falcatifolium—陆均松属的基部;④Lagarostrobsfranklinii和Manoaocolensoi应置于同一属Lagarostrobs内;⑤支持成立Halocarpus和Lepidothamnus属;⑥赞同Microstrobos和Microcachrys两属亲缘密切的观点。

Using Pinus thunbergii and Agathis australis as outgroups, the phylogeny of Podocarpaceae was inferred based on chloroplast trnL_F non_coding sequence data and a Bayesian method. The results exhibit:① Phyllocladus forms a monophyletic clade which is basal to the rest of the Podocarpaceae as a sister group; ②Nageia is nested within members of Podocarpaceae, appearing to be closely related to Podocarpus, Afrocarpus and Retrophyllum; ③ Dacrycarpus forms a well_supported clade which is basal to a sister clade of Falcatifolium and Dacrydium;④ Lagarostrobs franklinii and Manoao colensoi are suggested to be included in a single genus Lagarostrobs;⑤ The establishment of two genera, Halocarpus and Lepidothamnus, is lent support; and ⑥ the mutual affinity between Microstrobos and Microcachrys is proved.