Molecular phylogeny of the land snail genus Alopia (Gastropoda: Clausiliidae) reveals multiple inversions of chirality
Molecular phylogeny of the land snail genus Alopia (Gastropoda: Clausiliidae) reveals multiple inversions of chirality
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DOI：
10.1111/zoj.12002
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发表时间：
2013-02-01
影响因子：
2.8
通讯作者：
Szekeres, Miklos
中科院分区：
文献类型：
--
作者：
Feher, Zoltan;Nemeth, Laszlo;Szekeres, Miklos
虽然绝大多数腹足类动物都拥有右旋的外壳和身体组织，但Clasiliidae家族的成员几乎都是左旋的。在这个组的一个独特的功能高山属Alopia是比较代表的左旋和右旋类群，并存在对映体类群对，似乎只是在他们的手性不同。我们进行了分子系统发育研究，使用线粒体细胞色素氧化酶亚基I（COI）基因序列，以找出是否手性倒位更频繁地在这个属比其他属的陆生蜗牛。我们的研究结果揭示了多个独立的倒位在进化历史上的Alopia和成员之间的对映体对密切的遗传关系。推测的COI系统发育也为海萝属物种的分类划分和动物地理学评价提供了有价值的线索。大量的倒置形式表明绕丝方向的固定不稳定。这种缺陷和可用性的对映体对可能使Alopia物种有吸引力的实验模型，旨在阐明手性稳定性的分子基础的遗传研究。(c)2013年伦敦林奈学会
Whereas the vast majority of gastropods possess dextral shell and body organization, members of the Clausiliidae family are almost exclusively sinistral. Within this group a unique feature of the alpine genus Alopia is the comparable representation of sinistral and dextral taxa, and the existence of enantiomorph taxon pairs that appear to differ only in their chirality. We carried out a molecular phylogenetic study, using mitochondrial cytochromec oxidase subunitI (COI) gene sequences, in order to find out whether chiral inversions are more frequent in this genus than in other genera of land snails. Our results revealed multiple independent inversions in the evolutionary history of Alopia and a close genetic relationship between members of the enantiomorph pairs. The inferred COI phylogeny also provided valuable clues for the taxonomic division and zoogeographical evaluation of Alopia species. The high number of inverse forms indicates unstable fixation of the coiling direction. This deficiency and the availability of enantiomorph pairs may make Alopia species attractive experimental models for genetic studies aimed at elucidating the molecular basis of chiral stability.(c) 2013 The Linnean Society of London