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对金叶甲属(鞘翅目,叶甲科,叶甲亚科)分子系统学及寄主植物关联演化的新贡献。

New contributions to the molecular systematics and the evolution of host-plant associations in the genus Chrysolina (Coleoptera, Chrysomelidae, Chrysomelinae).

作者信息

Jurado-Rivera José A, Petitpierre Eduard

机构信息

Departament de Biologia, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain.

Departament de Biologia, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain; Institut Mediterrani d'Estudis Avançats, CSIC, Miquel Marquès 21, 07190 Esporles, Balearic Islands, Spain.

出版信息

Zookeys. 2015 Dec 17(547):165-92. doi: 10.3897/zookeys.547.6018. eCollection 2015.

Abstract

The taxonomic circumscription of the large and diverse leaf beetle genus Chrysolina Motschulsky is not clear, and its discrimination from the closely related genus Oreina Chevrolat has classically been controversial. In addition, the subgeneric arrangement of the species is unstable, and proposals segregating Chrysolina species into new genera have been recently suggested. In this context, the availability of a phylogenetic framework would provide the basis for a stable taxonomic system, but the existing phylogenies are based on few taxa and have low resolution. In the present study we perform a phylogenetic analysis based on mitochondrial (cox1 and rrnL) and nuclear (H3) DNA sequences from a sample of fifty-two Chrysolina species representing almost half of the subgeneric diversity of the group (thirty out of sixty-five subgenera) and most of the morphological, ecological and karyological variation in the genus. In addition, five Oreina species from two subgenera have also been analysed. The resulting phylogeny is used to evaluate some of the most relevant taxonomic hypotheses for Chrysolina, and also to reconstruct its ancestral host plant associations in a Bayesian framework. Our findings support the paraphyly of Chrysolina as currently defined due to the inclusion of Oreina, the monophyly of the Chrysolina (plus Oreina) species including the divergent Chrysolina (Polysticta) vigintimaculata (Clark, 1864), and enable inferences of deep-level evolutionary relationships among the studied subgenera. The plant family Lamiaceae is inferred as the ancestral host of the study group, whose evolution is characterized by continuous host-shifting among pre-existing host plant families. Some Chrysolina clades include mixtures of species with different levels of diet breadth, indicating that niche width has varied through time.

摘要

大型且多样的叶甲属Chrysolina Motschulsky的分类界定尚不明确,并且传统上,将其与近缘属Oreina Chevrolat区分开来一直存在争议。此外,该属物种的亚属划分不稳定,最近有人提出将Chrysolina的一些物种归入新属。在这种情况下,系统发育框架的建立将为稳定的分类系统提供基础,但现有的系统发育研究基于的分类单元较少,分辨率较低。在本研究中,我们基于线粒体(cox1和rrnL)和核(H3)DNA序列进行了系统发育分析,样本包括52种Chrysolina物种,几乎涵盖了该类群亚属多样性的一半(65个亚属中的30个)以及该属大部分的形态、生态和核型变异。此外,还分析了来自两个亚属的5种Oreina物种。所得的系统发育树用于评估Chrysolina一些最相关的分类假设,并在贝叶斯框架下重建其祖先寄主植物关联。我们的研究结果支持了当前定义的Chrysolina属的并系性,因为其中包含了Oreina属;Chrysolina(加上Oreina)物种是单系的,包括分化的Chrysolina(Polysticta)vigintimaculata(Clark,1864),并能够推断出所研究亚属之间深层次的进化关系。唇形科被推断为研究类群的祖先寄主,其进化特征是在已有的寄主植物科之间不断发生寄主转移。一些Chrysolina分支包含了不同食性广度水平的物种混合,这表明生态位宽度随时间发生了变化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58b6/4714339/5c7de14d76b6/zookeys-547-165-g001.jpg

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