摘要
老鸦瓣群(Amana群)是百合科中的一个东亚特有类群,仅分布在中国中东部、日本和朝鲜半岛。该类群在形态上与广义郁金香属Tulipa L.相似,但也具有与子房近等长的花柱以及2-3(-4)个苞片等与郁金香属不同的形态特征。有关该类群是否应置于郁金香属中或是否应独立为属的问题长期以来存在争议。为了澄清该问题,我们对产于中国的Amana群进行了广泛的标本室和野外形态观察,并采用分支系统学方法,对该类群3个种以及郁金香属的其他15种植物(包括土耳其的3个种)的28个形态性状数据进行了分支分析。结果表明广义郁金香属并非是一个单系类群。Amana群与广义郁金香属的其他4个组sect.Orithyia、sect. Eriostemones、sect. Leiostemones、sect. Tulipanum以及Lloydia属的两个种共同构成一个大支的3个分支。我们对广义郁金香属5个组共19种植物的ITS以及trnL-F分子序列综合分析的结果也表明:sect. Tulipanum、sect. Leiostemones、sect. Eriostemones和sect. Orithyia构成一大支,Amana群和猪牙花属的Erythronium sibiricum构成另一大支。因此,我们认为Amana群应从广义郁金香属中独立出来,恢复其老鸦瓣属Amana Honda作为属的分类地位。
Amana is a group in the Liliaceae (s.s.) confined to central and eastern China, Japan and Korean peninsula. This group is similar to Tulipa L. by having leaves 2-5 basal or cauline, flower usually solitary, erect, stamens 6, 3 longer, and anthers basifixed, but differs in having 2-3(-4) opposite or verticillate bracts at the upper part of the flowering stem and a longer style as long as ovary. It has long been in dispute if the Amana group should be included in the genus Tulipa or treated as an independent genus of its own. Based on both herbarium and field observations on the Chinese taxa of Tulipa (s.l.), particularly those in the Amana group, a cladistic analysis of 18 species (including 3 species from Turkey) of Tulipa was carried out in the present work. Twenty-eight morphological characters were used in unweighted pair-group method using the maximum parsimony (MP) tree construction executed with PAUP 4.0b4a program. The results show that Tulipa (s.l.) is not a monophyletic group but split into two clades: one is Amana group, and the other comprises Orithyia, Eriostemones, Leiostemones and Tulipanum. Our unpublished data of ITS and trnL-F sequences in 19 species representing five sections of Tulipa (s.l.) also show that sect. Tulipanum, sect. Leiostemones, sect. Eriostemones and sect. Orithyia form one clade, whereas the Amana group and. Erythronium form another clade. The Amana group is thus better treated as an independent genus.
出处
《植物分类学报》
SCIE
CSCD
北大核心
2005年第3期262-270,共9页
Acta Phytotaxonomica Sinica
基金
国家自然科学基金重大研究计划(90302004)
面上项目(30460011)资助~~
