Evolutionary assembly of the milkweed fauna:: Cytochrome oxidase I and the age of Tetraopes beetles
Evolutionary assembly of the milkweed fauna:: Cytochrome oxidase I and the age of Tetraopes beetles
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DOI：
10.1006/mpev.2000.0888
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发表时间：
2001-03-01
影响因子：
4.1
通讯作者：
Farrell, BD
中科院分区：
文献类型：
--
作者：
Farrell, BD
以相关植物科夹竹桃科和萝藦科（此处统称为“乳草”）为食的昆虫组成了一个由高度专业化、独特的物种谱系组成的“组成群落”，这些物种经常从寄主植物中隔离有毒的强心苷以防御捕食者，因此通常具有警戒性，从而表明它们随之而来的难吃性。这些专门的谱系为比较研究适应率、多样化和栖息地相关对分子进化的影响提供了机会。天牛属是新世界马利筋草食动物中最多样化的，该物种通常具有宿主特异性，仅限于单一、不同种类的马利筋，比大多数其他马利筋昆虫更常见。先前的工作揭示了这些甲虫的系统发育与其宿主的系统发育之间的对应关系。本研究对四足动物及其近亲的近乎完整的 DNA 序列进行了分析，用于建立四足动物与其马利筋宿主进化的分子钟和时间框架。 (C) 2001 年学术出版社。
The insects that feed on the related plant families Apocynaceae and Asclepiadaceae (here collectively termed "milkweeds") comprise a "component community" of highly specialized, distinctive lineages of species that frequently sequester toxic cardiac glycosides from their host plants for defense against predators and are thus often aposematic, advertising their consequent unpalatability. Such sets of specialized lineages provide opportunities for comparative studies of the rate of adaptation, diversification, and habitat-related effects on molecular evolution. The cerambycid genus Tetraopes is the most diverse of the new world milkweed herbivores and the species are generally host specific, being restricted to single, different species of Asclepias, more often so than most other milkweed insects. Previous work revealed correspondence between the phylogeny of these beetles and that of their hosts. The present study provides analyses of near-complete DNA sequences for Tetraopes and relatives that are used to establish a molecular clock and temporal framework for Tetraopes evolution with their milkweed hosts. (C) 2001 Academic Press.