Complete Chloroplast Genome of Enkianthus Lour. (Ericaceae): Comparative Analysis, Phylogenetic Relationships, Divergence History, and Adaptive Evolution

IF 2.3 2区生物学 Q2 ECOLOGY

Ecology and Evolution Pub Date : 2025-09-19 DOI:10.1002/ece3.72129

Shuilian Peng, Zhijun Zhai, Wan Hu, Hua Liang, Yi Yang, Yixuan Kou, Meixia Wang, Shanmei Cheng, Zhiyong Zhang, Dengmei Fan

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Abstract

Enkianthus (Ericaceae) is a small genus of great ornamental and ecological importance, preferring the specialized habitats in montane elfin forests of east Asia. Here, we for the first time sequenced, assembled, and annotated the complete chloroplast genomes of 16 species, representing all four sections of Enkianthus. The plastomes exhibited a typical quadripartite structure and were highly conserved in genome size, organization, and gene content. Plastid phylogenomics confirmed the monophyly of four sections of Andromedina, Enkiantella, Enkianthus, and Meisteria, with sect. Enkianthus as the first diverging clade. Divergence time analysis supported an ancient origin of Enkianthus at the Late Cretaceous but rapid recent radiation since the Lat-Miocene onward. Selection pressure analysis detected 12 positively selected genes, which might be linked to adaptive evolution in Enkianthus. These results will provide invaluable information for further population-level studies on species delimitation and adaptive evolution in Enkianthus, and will benefit Enkianthus conservation and utilization.

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金莲属植物叶绿体全基因组。（Ericaceae）：比较分析、系统发育关系、分化历史和适应性进化

云杉属（Ericaceae）是一个小属，具有重要的观赏和生态意义，喜欢在东亚山地矮林的特殊栖息地。在这里，我们首次测序、组装和注释了16个物种的完整叶绿体基因组，代表了Enkianthus的所有四个部分。质体体具有典型的四部结构，在基因组大小、组织和基因含量上高度保守。质体系统基因组学证实了Andromedina、Enkiantella、Enkianthus和Meisteria四个分支的单系性，其中Enkianthus分支为第一个分支。分化时间分析支持了Enkianthus在晚白垩纪的古老起源，但自晚中新世以来，最近的快速辐射。选择压力分析检测到12个正选择基因，这些正选择基因可能与Enkianthus的适应性进化有关。这些研究结果将为进一步在种群水平上研究菊科植物的物种划分和适应进化提供宝贵的信息，并为菊科植物的保护和利用提供参考。

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来源期刊

Ecology and Evolution ECOLOGY-

CiteScore

4.40

自引率

3.80%

发文量

1027

审稿时长

3-6 weeks

期刊介绍： Ecology and Evolution is the peer reviewed journal for rapid dissemination of research in all areas of ecology, evolution and conservation science. The journal gives priority to quality research reports, theoretical or empirical, that develop our understanding of organisms and their diversity, interactions between them, and the natural environment. Ecology and Evolution gives prompt and equal consideration to papers reporting theoretical, experimental, applied and descriptive work in terrestrial and aquatic environments. The journal will consider submissions across taxa in areas including but not limited to micro and macro ecological and evolutionary processes, characteristics of and interactions between individuals, populations, communities and the environment, physiological responses to environmental change, population genetics and phylogenetics, relatedness and kin selection, life histories, systematics and taxonomy, conservation genetics, extinction, speciation, adaption, behaviour, biodiversity, species abundance, macroecology, population and ecosystem dynamics, and conservation policy.