Phylogenomics of the Aphididae: Deep relationships between subfamilies clouded by gene tree discordance, introgression and the gene tree anomaly zone

IF 4.7 1区 农林科学 Q1 ENTOMOLOGY
Christopher L. Owen, Gary L. Miller
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引用次数: 5

Abstract

Aphids (Hemiptera: Aphididae) are a lineage of ~5200 plant-feeding insects most abundant in temperate regions. The diversification of aphids is thought to be a rapid radiation, whereas abiotic and biotic factors heavily influence the morphologies. These factors have clouded the taxonomy at all taxonomic ranks, and the effect can be viewed in many incongruent molecular and morphological phylogenies. In this study, we address this problem using both genome and transcriptome data to estimate the phylogenomic relationships between 12 subfamilies with 48 ingroup taxa. We predicted a novel well-curated dataset of phylogenetically consistent orthologues that included 3162 genes to estimate a concatenated maximum likelihood and multi-species coalescent species trees. Our results suggest that there are three main clades of Aphididae subfamilies, which are congruent with a previous Sanger sequencing-based phylogenetic study. However, the relationship between the three clades of subfamilies is clouded by gene tree discordance, introgression and parent–child branches along the backbone that fall within the gene tree anomaly zone. In addition, our results suggest an introgression event between two agriculturally important species of aphids within the subfamily Aphidinae. Our research provides the first phylogenomic study of the Aphididae subfamilies and a foundation for future molecular and morphological studies into this adaptive radiation of insects.

Abstract Image

蚜虫科的系统基因组学:被基因树不一致、基因渗入和基因树异常区遮蔽的亚科之间的深层关系
蚜虫(半翅目:蚜虫科)是一种约5200种植物食性昆虫,主要分布在温带地区。蚜虫的多样化被认为是一种快速辐射,而非生物和生物因素对蚜虫的形态有很大影响。这些因素影响了所有分类等级的分类,并在许多不一致的分子和形态系统发生中可以看到这种影响。在这项研究中,我们利用基因组和转录组数据来估计12个亚科与48个群内分类群之间的系统基因组关系。我们预测了一个新的精心策划的数据集,其中包括3162个基因,用于估计串联的最大似然和多物种聚结的物种树。我们的研究结果表明,蚜虫亚科有三个主要分支,这与先前基于Sanger测序的系统发育研究是一致的。然而,由于基因树不一致、基因渗入和位于基因树异常区的骨干上的亲子分支,亚家族的三个分支之间的关系模糊不清。此外,我们的研究结果表明,在蚜虫亚科中,两种重要的农业蚜虫物种之间存在渗入事件。我们的研究为蚜虫亚科的首次系统发育研究提供了基础,并为未来昆虫适应辐射的分子和形态学研究奠定了基础。
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来源期刊
Systematic Entomology
Systematic Entomology 生物-进化生物学
CiteScore
10.50
自引率
8.30%
发文量
49
审稿时长
>12 weeks
期刊介绍: Systematic Entomology publishes original papers on insect systematics, phylogenetics and integrative taxonomy, with a preference for general interest papers of broad biological, evolutionary or zoogeographical relevance.
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