Radiations of fairy-aprons (Utricularia dichotoma, Lentibulariaceae) in Australia and New Zealand: molecular evidence and proposal of new subspecies

IF 1.5 3区 生物学 Q4 EVOLUTIONARY BIOLOGY
R. W. Jobson, Paulo Baleeiro
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引用次数: 2

Abstract

Abstract. The Utricularia dichotoma Labill. complex is a morphologically and ecologically variable group of closely related taxa with a mostly temperate distribution across New Zealand, New Caledonia and Australia. Taxonomic boundaries within the complex have been the subject of speculation, with several previously recognised species being synonymised after a nomenclatural revision. We sampled 296 populations representing all known taxa; 223 accessions were used in the full phylogenetic analysis based on two non-coding chloroplast regions (rps16, trnD–T) and two nuclear ribosomal spacers (external transcribed spacer, ETS; internal transcribed spacer-1, ITS-1), whereas the remaining accessions were identified by using ITS-1 barcodes. We found strong support for a paraphyletic U. dichotoma, with accessions matching the type material of that name grouped within a polytomy that includes clades containing accessions of U. monanthos Hook.f and U. novae-zelandiae Hook.f. Specific statuses for five recently described species previously included in U. dichotoma s.l. do not fall within this polytomy, nor do the two species U. oppositiflora R.Br. and U. speciosa R.Br. resurrected from synonymy of U. dichotoma. All sampled accessions from New Zealand form a single clade within U. dichotoma as recognised here. We here propose that seven clades recovered here be recognised as subspecies, and describe eight new subspecies, including two new combinations. We also propose that the monophyletic clade sister to U. beaugleholei Gassin be assigned to subspecies rank under that name.
澳大利亚和新西兰仙子的辐射:分子证据和新亚种的提出
摘要双歧水蛭。complex是一个形态和生态变化密切相关的分类群,主要分布在新西兰,新喀里多尼亚和澳大利亚。在复杂的分类学边界一直是猜测的主题,有几个以前承认的物种在命名修订后被同义词。我们采样了296个种群,代表了所有已知的分类群;223份材料基于两个非编码叶绿体区域(rps16, trend - t)和两个核糖体间隔区(外部转录间隔区,ETS;内部转录间隔-1,ITS-1),而其余的加入是通过ITS-1条形码识别的。我们发现了对一种副葡萄球菌二分类的强有力支持,与该名称的类型材料相匹配的材料被分组在一个多边形中,其中包括含有葡萄球菌的分支。f和美国新泽兰迪亚胡克。最近描述的五种以前包括在U. dichotoma s.l.的特定状态不属于这种多重分类,两个种U. opposiflora R.Br也不属于这种多重分类。和U. speciosa R.Br。由美国dichotoma的同义词复活。所有来自新西兰的样本组成了一个单一的分支,在这里被认可。在此,我们建议将这里发现的7个分支作为亚种,并描述了8个新的亚种,包括两个新的组合。我们还建议将与美国的单系姐妹进化枝分配到该名称下的亚种等级。
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来源期刊
Australian Systematic Botany
Australian Systematic Botany 生物-进化生物学
CiteScore
3.10
自引率
12.50%
发文量
12
审稿时长
>12 weeks
期刊介绍: Australian Systematic Botany is an international journal devoted to the systematics, taxonomy, and related aspects of biogeography and evolution of all algae, fungi and plants, including fossils. Descriptive taxonomic papers should normally constitute a comprehensive treatment of a group. Short papers on individual species and nomenclatural papers must contain significant new information of broader interest to be considered. The prestigious L.A.S. Johnson Review Series is published. Other review articles will also be considered. All papers are peer reviewed. Australian Systematic Botany is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.
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