珍珠菜属系统发育关系的初步研究  

PHYLOGENETIC RELATIONSHIPS IN LYSIMACHIA (PRIMULACEAE): A CLADISTIC ANALYSIS

作　　者：郝刚[1] 胡启明[1] 

机构地区：[1]中国科学院华南植物研究所,广东广州510650

出　　处：《热带亚热带植物学报》2001年第2期93-100,共8页Journal of Tropical and Subtropical Botany

基　　金：国家自然科学基金(39970053)资助

摘　　要：本文运用形态学性状对珍珠菜属（Ｌｙｓｉｍａｃｈｉａ）进行系统发育分析。内类群包括珍珠菜属２９个代表种以及珍珠菜族其它单种、寡种属；仙客来属（Ｃｙｃｌａｍｅｎ）被选作外类群。最简约性分析表明，珍珠菜属并不构成一自然分类群；在其严格一致化树的二歧分支中，异花珍珠菜（Ｌ．ｃｒｉｓｐｉｄｅｎｓ）单独构成一支，其它所有内类群构成一支。香草亚属（ｓｕｂｇｅｎ．Ｉｄｉｏｐｈｙｔｏｎ）、木黄连花亚属（ｓｕｂｇｅｎ．Ｌｙｓｉｍａｃｈｉｏｐｓｉｓ）以及珍珠菜亚属（ｓｕｂｇｅｎ．Ｐａｌｌａｄｉａ）均表现为单系群，而黄连花亚属（ｓｕｂｇｅｎ．Ｌｙｓｉｍａｃｈｉａ）则为一异形的并系群。球尾花正属（ｓｕｂｇｅｎ．Ｎａｕｍｂｕｒｇｉａ）仍“内藏”于珍珠菜属的主体之中，而喉鳞花亚属（ｓｕｂｇｅｎ．Ｓｅｌｅｕｃｉａ）则偏离出来而与七瓣莲属（Ｔｒｉｅｎｔａｌｉｓ）构成姐妹群。如何准确地界定珍珠菜属和进行属下分类群的划分，还需进一步研究．Based on morphological data, a phylogenetic analysis was performed to study the circumscription and infrageneric classification of the genus Lysimachia. Parsimony analysis showed that Lysimachia was paraphyletic, with L. crispidens as the sister group to all the other samplings, including those small genera of the tribe Lysimachieae. The monophylies of subgen. Idiophyton, subgen. Lysimachiopsis and subgen. Palladia were supported, while subgen. Lysimachia was found to be paraphyletic. The subgen. Naumburgia, whose status being controversial, was nested within the main Lysimachia group. Subgen. Seleucia, however, was deviated and grouped with Trientalis. It is noted that in this study most morphological characters are homoplasious and hence only some internal clades receive moderate bootstrap support. Further studies, especially DNA sequencing approaches, are needed before an unambiguous phylogeny is achieved for the genus.

关 键 词：珍珠菜属 形态学 系统发育 

分 类 号：Q949[生物学—植物学]