叶绿体基因组和核糖体DNA提供了高山通通虫分化和形态进化的见解

IF 3.7 1区 生物学 Q1 Agricultural and Biological Sciences Journal of Systematics and Evolution Pub Date : 2023-11-27 DOI:10.1111/jse.13028
Ling-Jian Gui, Deng-Feng Xie, Chang Peng, Ting Ren, Li-Ying Yu, Song-Dong Zhou, Xing-Jin He
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引用次数: 0

摘要

汤加是东亚支(蜂科)的一个草本属,分布在高山地区。DNA片段的使用并没有提供一个很好解决的进化史。在本次研究中,我们主要采集了横断山区内通罗亚及其近缘分类群的类型分布区样本。采用基因组扫描测序方法,对27个分类群的叶绿体基因组和核糖体DNA重复序列进行了组装。我们分析了Tongoloa cp基因组的特征,发现倒置重复序列显著扩增。与光合作用有关的三个基因(ndhC、ndhJ和petG)似乎经历了显著的选择压力。通过高分辨率的系统发育分析,cpDNA提供了令人信服的证据,支持Sinolimprichtia作为Tongoloa的早期分类单元。然而,nrDNA表明Tongoloa和Sinolimprichtia属于不同的分支。形态分析表明,铜绿属的果实宽卵圆形,基部心形,而青花属的果实长倒卵形,基部钝。在cpDNA系统发育树中,发现Sinolimprichtia特有的果实形态嵌套在Tongoloa中。古代基因渗入和叶绿体捕获为nrDNA和cpDNA系统发育之间的重大冲突提供了最合理的解释。我们的研究强调了Tongoloa复杂的进化史对以前分类处理中遇到的挑战的潜在影响。
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Chloroplast genomes and ribosomal DNA provide insights into divergence and morphological evolution of alpine Tongoloa
Tongoloa is a herbaceous genus of East Asia Clade (Apiaceae) distributed in the alpine regions. The use of DNA fragments has not provided a well-resolved evolutionary history. For this research, we primarily collected samples from the type localities of Tongoloa and closely related taxa in the Hengduan Mountains. The chloroplast (cp) genomes and nuclear ribosomal (nr) DNA repeats of 27 taxa were assembled using genome skimming sequencing reads. We analyzed the characteristics of the Tongoloa cp genome, and found a remarkable expansion of the Inverted Repeats. Three genes (ndhC, ndhJ, and petG) related to photosynthesis appear to have undergone significant selective pressure. Through high-resolution phylogenetic analysis, the cpDNA provided compelling evidence supporting the inclusion of Sinolimprichtia as an early taxon within Tongoloa. However, the nrDNA suggested that Tongoloa and Sinolimprichtia belong to distinct branches. Morphological analysis showed that Tongoloa has broadly oval fruits with a cordate base, whereas the fruits of Sinolimprichtia are long-obovate with an obtuse base. The specific fruit morphology of Sinolimprichtia was found to be nested within Tongoloa in the cpDNA phylogenetic tree. Ancient introgression and chloroplast capture provide the most plausible explanation for the significant conflict between the nrDNA and cpDNA phylogenies. Our study highlights the potential impact of the complex evolutionary history of Tongoloa on the challenges encountered in previous taxonomic treatments.
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来源期刊
Journal of Systematics and Evolution
Journal of Systematics and Evolution Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
7.40
自引率
8.10%
发文量
1368
审稿时长
6-12 weeks
期刊介绍: Journal of Systematics and Evolution (JSE, since 2008; formerly Acta Phytotaxonomica Sinica) is a plant-based international journal newly dedicated to the description and understanding of the biological diversity. It covers: description of new taxa, monographic revision, phylogenetics, molecular evolution and genome evolution, evolutionary developmental biology, evolutionary ecology, population biology, conservation biology, biogeography, paleobiology, evolutionary theories, and related subjects.
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