Morphometric relationship, phylogenetic correlation, and character evolution in the species-rich genus Aphis (Hemiptera: Aphididae).
Morphometric relationship, phylogenetic correlation, and character evolution in the species-rich genus Aphis (Hemiptera: Aphididae).
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DOI：
10.1371/journal.pone.0011608
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发表时间：
2010-07-15
期刊：
影响因子：
3.7
通讯作者：
Lee S
中科院分区：
文献类型：
--
作者：
Kim H;Lee W;Lee S
物种丰富的蚜虫属由500多个物种组成，其中许多物种在广泛的植物上具有宿主特异性，但由于向特定形态类型的趋同而在一般外观上非常相似。大多数物种在历史上被分为四个主要的表型组（棉，craccivora，蚕豆，和spiraecola组）。为了确认这些群体之间的形态假设，并检查确定它们的特征，多变量形态测量分析进行了使用28个字符测量/计数从40个物种。为了推断形态关系是否与遗传关系相关，我们将形态测量数据集与从三个mtDNA和一个核DNA区域的组合数据集重建的遗传学数据集进行了比较。基于形态学和分子数据集的比较，我们证实了与相关组不同，棉组的形态减少或退化。多数形态特征的棉组的变量比其他组。因此，在形态学上可以很好地将棉属的类群与薄壳类、蚕豆类和绣线菊属的类群区分开来。此外，形态学和DNA数据集之间的进化速率的相关性是非常显着的多样化。棉种组与其它种组的形态分离与它们的系统发育关系相一致。性状进化的分析表明，被认为是显着的形态特征的基础上的形态计量学分析是可信的相关性与遗传。性状进化的主导模式导致短枝率增加和时间上的后期进化可能适合蚜虫物种形成的方式，因为它们适应了物种特异性，迅速，最近在许多不同的宿主植物。
The species-rich genus Aphis consists of more than 500 species, many of them host-specific on a wide range of plants, yet very similar in general appearance due to convergence toward particular morphological types. Most species have been historically clustered into four main phenotypic groups (gossypii, craccivora, fabae, and spiraecola groups). To confirm the morphological hypotheses between these groups and to examine the characteristics that determine them, multivariate morphometric analyses were performed using 28 characters measured/counted from 40 species. To infer whether the morphological relationships are correlated with the genetic relationships, we compared the morphometric dataset with a phylogeny reconstructed from the combined dataset of three mtDNA and one nuclear DNA regions. Based on a comparison of morphological and molecular datasets, we confirmed morphological reduction or regression in the gossypii group unlike in related groups. Most morphological characteristics of the gossypii group were less variable than for the other groups. Due to these, the gossypii group could be morphologically well separated from the craccivora, fabae, and spiraecola groups. In addition, the correlation of the rates of evolution between morphological and DNA datasets was highly significant in their diversification. The morphological separation between the gossypii group and the other species-groups are congruent with their phylogenetic relationships. Analysis of trait evolution revealed that the morphological traits found to be significant based on the morphometric analyses were confidently correlated with the phylogeny. The dominant patterns of trait evolution resulting in increased rates of short branches and temporally later evolution are likely suitable for the modality of Aphis speciation because they have adapted species-specifically, rapidly, and more recently on many different host plants.
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影响因子：
1.9
作者：
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