PDF(Pubmed)
Abstract：
The phylogeny of the genus Paphiopedilum based on the plastome is consistent with morphological analysis. However, to date, none of the analyzed nuclear markers has confirmed this. Topology incongruence among the trees of different nuclear markers concerns entire sections of the subgenus Paphiopedilum. The low-copy nuclear protein-coding gene PHYC was obtained for 22 species representing all sections and subgenera of Paphiopedilum. The nuclear-based phylogeny is supported by morphological characteristics and plastid data analysis. We assumed that an incongruence in nuclear gene trees is caused by ancestral homoploid hybridization. We present a model for inferring the phylogeny of the species despite the incongruence of the different tree topologies. Our analysis, based on six low-copy nuclear genes, is congruent with plastome phylogeny and has been confirmed by phylogenetic network analysis.
摘要：
基于塑性体的罂粟属的系统发育与形态分析一致。然而,到目前为止,分析的核标记都没有证实这一点。不同核标记的树之间的拓扑不一致涉及Paphiopedilum亚属的整个部分。获得了22个物种的低拷贝核蛋白编码基因PHYC，这些物种代表了Paphiopedilum的所有部分和亚属。形态特征和质体数据分析支持基于核的系统发育。我们假设核基因树的不一致是由祖先同倍体杂交引起的。尽管不同的树拓扑不一致，我们还是提供了一个推断物种系统发育的模型。我们的分析,基于六个低拷贝核基因，与质体系统发育一致，并已通过系统发育网络分析得到证实。
