Origin, evolution, dispersal and global population genetic structure of Carlavirus sigmasolani.

IF 4.1 2区 生物学 Q1 PLANT SCIENCES
Frontiers in Plant Science Pub Date : 2025-09-24 eCollection Date: 2025-01-01 DOI:10.3389/fpls.2025.1667771
Jianlin Lei, Beibei Liang, Hongwei Yang, Bo Zhang
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引用次数: 0

Abstract

Carlavirus sigmasolani (Potato virus S, PVS) is a globally distributed plant virus infecting cultivated potato (Solanum tuberosum), causing yield losses and reduced tuber quality in the host crop, yet its evolutionary history, global dissemination and population genetic structure remain incompletely understood. In this study, we conducted comprehensive phylogenetic and Bayesian phylogeographic analyses of PVS using all available complete genome and coat protein (CP) gene sequences from 35 countries. Genome-based phylogenetic reconstruction identified four major phylogroups (I-IV), with Phylogroup I comprising only Colombian isolates and Phylogroup IV showing the broadest geographic distribution. In contrast, CP gene-based analyses revealed seven phylogroups (I-VII), including regionally restricted Phylogroups V (Colombia) and VI (Ecuador), and the globally dominant Phylogroup VII. A time-scaled Bayesian phylogenetic framework estimated a mean substitution rate of 3.11 × 10-4 substitutions/site/year (95% HPD: 2.19 × 10-4-4.07 × 10-4), and dated the most recent common ancestor (tMRCA) of PVS to approximately 1296 (95% HPD: 964-1578). Phylogeographic analysis based on CP gene sequences suggests that Ecuador is a likely center of origin for PVS, with intercontinental dissemination beginning in the 16th century and markedly accelerating during the 19th and 20th centuries. Iran and China were identified as major secondary hubs during this period, while Europe and the United States also contributed to global dissemination as important intercontinental transmission centers during the 20th and 21st centuries. Population genetic analyses indicated that South America retains the highest diversity, reinforcing its status as the center of origin, while the markedly lower diversity in Africa and Oceania suggests more recent introductions coupled with restricted gene flow. These data improve our understanding of PVS evolution, spread and population structure, supporting the development of effective monitoring and control strategies.

sigmasolani卡拉病毒的起源、进化、传播和全球群体遗传结构。
马铃薯病毒(Carlavirus sigmasolani,简称PVS)是一种全球分布的植物病毒,侵染栽培马铃薯(Solanum tuberosum),造成寄主作物产量损失和块茎品质下降,但其进化史、全球传播和群体遗传结构尚不完全清楚。在这项研究中,我们利用来自35个国家的所有可用的PVS全基因组和外壳蛋白(CP)基因序列进行了全面的系统发育和贝叶斯系统地理分析。基于基因组的系统发育重建确定了4个主要的系统群(I-IV),其中系统群I仅包括哥伦比亚分离株,而系统群IV具有最广泛的地理分布。相比之下,基于CP基因的分析显示了7个系统群(I-VII),包括区域性受限的系统群V(哥伦比亚)和系统群VI(厄瓜多尔),以及全球优势的系统群VII。时间尺度贝叶斯系统发育框架估计,PVS的平均替代率为3.11 × 10-4次/位点/年(95% HPD: 2.19 × 10-4-4.07 × 10-4),并确定其最近的共同祖先(tMRCA)约为1296年(95% HPD: 964-1578)。基于CP基因序列的系统地理学分析表明,厄瓜多尔可能是PVS的起源中心,其洲际传播始于16世纪,并在19世纪和20世纪显著加速。在此期间,伊朗和中国被确定为主要的次要枢纽,而欧洲和美国在20世纪和21世纪也作为重要的洲际传播中心为全球传播做出了贡献。种群遗传分析表明,南美洲保持了最高的多样性,巩固了其作为起源中心的地位,而非洲和大洋洲的多样性明显较低,表明最近的引进加上基因流动的限制。这些数据提高了我们对pv进化、传播和种群结构的理解,为制定有效的监测和控制策略提供了支持。
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来源期刊
Frontiers in Plant Science
Frontiers in Plant Science PLANT SCIENCES-
CiteScore
7.30
自引率
14.30%
发文量
4844
审稿时长
14 weeks
期刊介绍: In an ever changing world, plant science is of the utmost importance for securing the future well-being of humankind. Plants provide oxygen, food, feed, fibers, and building materials. In addition, they are a diverse source of industrial and pharmaceutical chemicals. Plants are centrally important to the health of ecosystems, and their understanding is critical for learning how to manage and maintain a sustainable biosphere. Plant science is extremely interdisciplinary, reaching from agricultural science to paleobotany, and molecular physiology to ecology. It uses the latest developments in computer science, optics, molecular biology and genomics to address challenges in model systems, agricultural crops, and ecosystems. Plant science research inquires into the form, function, development, diversity, reproduction, evolution and uses of both higher and lower plants and their interactions with other organisms throughout the biosphere. Frontiers in Plant Science welcomes outstanding contributions in any field of plant science from basic to applied research, from organismal to molecular studies, from single plant analysis to studies of populations and whole ecosystems, and from molecular to biophysical to computational approaches. Frontiers in Plant Science publishes articles on the most outstanding discoveries across a wide research spectrum of Plant Science. The mission of Frontiers in Plant Science is to bring all relevant Plant Science areas together on a single platform.
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