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首页> 外文期刊>Molecular phylogenetics and evolution >A mitochondrial-DNA-based phylogeny for some evolutionary-genetic model species of Colias butterflies (Lepidoptera, Pieridae)
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A mitochondrial-DNA-based phylogeny for some evolutionary-genetic model species of Colias butterflies (Lepidoptera, Pieridae)

机译：基于线粒体-DNA的系统进化论，研究了一些lia蝶的进化遗传模型物种（鳞翅目，Pier科）

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摘要

We study the phylogenetic relationships among some North American Colias ("Sulfur") butterflies, using mitochondrial gene sequences (ribosomal RNA, cytochrome oxidase I + II) totaling about 20% of the mitochondrial genome. We find that (1) the lowland species complex shows a branching order different from earlier views; (2) several montane and northern taxa may be more distinct than in earlier views; (3) one morphologically conservative Holarctic assemblage, C. hecla, is differentiated at the molecular-genetic level into at least three taxa which occupy distinct positions in the phylogeny and are sisters to diverse other taxa. These conclusions, constituting phylogenetic hypotheses, are supported by parsimony, maximum-likelihood, and Bayesian reconstruction algorithms. They are tested formally, by interior branch tests and paired-site tests, against alternative hypotheses derived from conventional species and subspecies naming combinations. In all cases our hypotheses are supported by these tests and the conventional alternatives are rejected. The "barcoding" subset of cytochrome oxidase I sequence identifies only some of the taxa supported by our full data set. Comparison of genetic divergence values among Colias taxa with those among related Pierid butterflies suggests that species radiations within Colias are comparatively younger. This emerging Colias phylogeny facilitates comparisons of genetic polymorphism and other adaptive mechanisms among taxa, thereby connecting micro- and macro-evolutionary processes. (C) 2008 Elsevier Inc. All rights reserved.
机译：我们使用线粒体基因序列（核糖体RNA，细胞色素氧化酶I + II）总计约占线粒体基因组的20％，研究了一些北美Colias（“硫磺”）蝴蝶之间的亲缘关系。我们发现（1）低地物种复合物显示的分支顺序与早期观点不同; （2）山区和北部分类单元可能比以前的观点更为明显; （3）一个形态上保守的整群人C. hecla，在分子遗传学水平上被区分为至少三个类群，它们在系统发育中占据独特的位置，并且是其他各种类群的姐妹。这些结论构成系统发育假说，得到简约，最大似然和贝叶斯重建算法的支持。通过内部分支测试和配对站点测试对它们进行了正式测试，以对照源自常规物种和亚种命名组合的替代假设。在所有情况下，这些检验均支持我们的假设，而常规选择则被拒绝。细胞色素氧化酶I序列的“条形码”子集仅识别我们完整数据集支持的某些分类单元。比较科利亚斯类群和相关皮蝶类的遗传散度值表明，科利亚斯内部的物种辐射相对年轻。这种新兴的Colias系统发育促进了类群之间遗传多态性和其他适应性机制的比较，从而连接了微观和宏观进化过程。 （C）2008 Elsevier Inc.保留所有权利。

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