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引用次数: 0
摘要
生物入侵包括不同的时空阶段,并伴随着生态和进化变化。了解入侵动态背后的基因组学,可以深入了解地理来源和遗传多样性,有助于跨时空的成功入侵。在这里,我们利用基因组数据和基于模型的方法来描述韩国一种有害杂草 Hypochaeris radicata L. 的入侵动态。我们利用从 22 个种群中抽取的 283 个个体的 3563 个 SNP 调查了遗传多样性和分配模式。我们采用了一种基于聚合的模拟方法来估计每个种群的人口变化,并使用基于系统发育和种群遗传模型的方法来推断殖民历史。我们的数据表明,H. radicata 在过去 50 年中多次从多个遗传源引入韩国,经历了微弱的种群瓶颈,随后又经历了种群扩张。这些发现凸显了其进一步扩大分布范围的潜力,尤其是在人为传播的情况下。我们的研究是首次在种群水平上对成功的全球入侵者 H. radicata 在欧洲以外的入侵动态进行基因组研究。
Multiple introductions of divergent lineages and admixture conferred the high invasiveness in a widespread weed (Hypochaeris radicata)
Biological invasion consists of spatially and temporally varying stages, accompanied by ecological and evolutionary changes. Understanding the genomics underlying invasion dynamics provides critical insights into the geographic sources and genetic diversity, contributing to successful invasions across space and time. Here, we used genomic data and model-based approaches to characterize the invasion dynamics of Hypochaeris radicata L., a noxious weed in Korea. Genetic diversity and assignment patterns were investigated using 3563 SNPs of 283 individuals sampled from 22 populations. We employed a coalescent-based simulation method to estimate demographic changes for each population and inferred colonization history using both phylogenetic and population genetic model-based approaches. Our data suggest that H. radicata has been repeatedly been introduced to Korea from multiple genetic sources within the last 50 years, experiencing weak population bottlenecks followed by subsequent population expansions. These findings highlight the potential for further range expansion, particularly in the presence of human-mediated dispersal. Our study represents the first population-level genomic research documenting the invasion dynamics of the successful worldwide invader, H. radicata, outside of Europe.
期刊介绍:
Evolutionary Applications is a fully peer reviewed open access journal. It publishes papers that utilize concepts from evolutionary biology to address biological questions of health, social and economic relevance. Papers are expected to employ evolutionary concepts or methods to make contributions to areas such as (but not limited to): medicine, agriculture, forestry, exploitation and management (fisheries and wildlife), aquaculture, conservation biology, environmental sciences (including climate change and invasion biology), microbiology, and toxicology. All taxonomic groups are covered from microbes, fungi, plants and animals. In order to better serve the community, we also now strongly encourage submissions of papers making use of modern molecular and genetic methods (population and functional genomics, transcriptomics, proteomics, epigenetics, quantitative genetics, association and linkage mapping) to address important questions in any of these disciplines and in an applied evolutionary framework. Theoretical, empirical, synthesis or perspective papers are welcome.