不一致的剑齿虎群系统发育(剑齿虎科，哺乳动物):过去网状结构的足迹?

IF 2.3 2区生物学 Q2 EVOLUTIONARY BIOLOGY

Zoologica Scripta Pub Date : 2023-02-20 DOI:10.1111/zsc.12590

A. Raspopova, V. Lebedev, J. Searle, A. Bannikova

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引用次数: 1

摘要

在本研究中，我们基于20个核基因座和线粒体cyt b基因重建了染色体可变的苍兰属物种群内的系统发育关系。在物种树中，近北极S.arcticus代表了该类群最早的分支，其次是全北极S.tundrensis和西伯利亚S.daphaenodon。其他五个主要分布在欧洲的物种形成了一个支撑良好的分支。编码区显示出比内含子更强的系统发育信号。结果表明，在该群体的进化过程中，网状结构的发生率很高。伊比利亚鼩的真实线粒体谱系被发现在系统发育上与新冠鼩接近，这证实了伊比利亚鼩S.granarius的一些种群是从S.araneus渗入的。首次揭示了更深网状结构的足迹，表明弓形S.arcticus和冠状S.coronatus谱系的潜在杂交起源。古代杂交被认为是基于分子和核型的系统发育重建之间不一致的来源。

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Discordant phylogenies in the Sorex araneus group (Soricidae, Mammalia): Footprints of past reticulations?

In the present study, we reconstruct phylogenetic relationships within the chromosomally variable Sorex araneus species group based on 20 nuclear loci and the mitochondrial cyt b gene. In the species tree, Nearctic S. arcticus represents the earliest offshoot of the group followed by Holarctic S. tundrensis and Siberian S. daphaenodon. Five other species distributed mostly in Europe form a well‐supported clade. Coding regions showed stronger phylogenetic signal than introns. The results suggest a high incidence of reticulation in the evolution of the group. The authentic mitochondrial lineage of the Iberian shrew S. granarius was found to be close phylogenetically to S. coronatus, which confirms that some populations of the Iberian shrew S. granarius were introgressed from S. araneus. Footprints of deeper reticulations are revealed for the first time, indicating the potential hybrid origin of the S. arcticus and S. coronatus lineages. Ancient hybridisations are hypothesised to be the source of discordance between molecular‐ and karyotype‐based phylogenetic reconstructions.

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来源期刊

Zoologica Scripta 生物-动物学

CiteScore

5.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Zoologica Scripta publishes papers in animal systematics and phylogeny, i.e. studies of evolutionary relationships among taxa, and the origin and evolution of biological diversity. Papers can also deal with ecological interactions and geographic distributions (phylogeography) if the results are placed in a wider phylogenetic/systematic/evolutionary context. Zoologica Scripta encourages papers on the development of methods for all aspects of phylogenetic inference and biological nomenclature/classification. Articles published in Zoologica Scripta must be original and present either theoretical or empirical studies of interest to a broad audience in systematics and phylogeny. Purely taxonomic papers, like species descriptions without being placed in a wider systematic/phylogenetic context, will not be considered.