Genomics of invasion: diversity and selection in introduced populations of monkeyflowers (Mimulus guttatus).
Genomics of invasion: diversity and selection in introduced populations of monkeyflowers (Mimulus guttatus).
复制标题
入侵基因组学：引进猴花种群（Mimulus guttatus）的多样性和选择。
DOI：
10.1111/mec.12875
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发表时间：
2014
影响因子：
4.9
通讯作者：
Puzey J
中科院分区：
文献类型：
--
作者：
Puzey J
全球贸易和旅行正在不可逆转地改变世界各地的物种分布。由于引入的物种在殖民化过程中经历了剧烈的人口统计学事件，并且经常面临来自其原生范围的新环境挑战，因此引入的种群可能会经历快速的进化变化。基因组研究提供了一个机会，通过分析这些过程在基因组变异上留下的签名，来调查人口统计、历史和选择过程在多大程度上塑造了引进种群的基因组结构。在这里，我们使用下一代测序来比较原生和引入的黄色猴花（Mimulus guttatus）种群的全基因组关系和多样性模式。来自英国（UK）的10个引入种群和北美（NA）的12个本地M. guttatuspopulations的基因组重测序数据表明，引入范围内的中性遗传多样性减少，并表明英国种群来自北太平洋周围的地理区域。选择性扫描分析显示，14条染色体中有5条染色体的位点频率变化与选择一致，这些区域的基因显示沉默位点多样性降低。虽然选择的目标是未知的，与开花时间和生物和非生物胁迫相关的基因位于扫描区域内。未来确定引进英国人口的具体来源将有助于确定所观察到的选择性扫描是否可以追溯到未抽样的本地人口或自跨越大西洋传播以来发生。我们的研究证明了全基因组分析在揭示影响入侵种群的一系列进化过程方面的总体潜力。
Global trade and travel is irreversibly changing the distribution of species around the world. Because introduced species experience drastic demographic events during colonization and often face novel environmental challenges from their native range, introduced populations may undergo rapid evolutionary change. Genomic studies provide the opportunity to investigate the extent to which demographic, historical and selective processes shape the genomic structure of introduced populations by analysing the signature that these processes leave on genomic variation. Here, we use next‐generation sequencing to compare genome‐wide relationships and patterns of diversity in native and introduced populations of the yellow monkeyflower (Mimulus guttatus). Genome resequencing data from 10 introduced populations from the United Kingdom (UK) and 12 nativeM. guttatuspopulations in North America (NA) demonstrated reduced neutral genetic diversity in the introduced range and showed that UK populations are derived from a geographic region around the North Pacific. A selective‐sweep analysis revealed site frequency changes consistent with selection on five of 14 chromosomes, with genes in these regions showing reduced silent site diversity. While the target of selection is unknown, genes associated with flowering time and biotic and abiotic stresses were located within the swept regions. The future identification of the specific source of origin of introduced UK populations will help determining whether the observed selective sweeps can be traced to unsampled native populations or occurred since dispersal across the Atlantic. Our study demonstrates the general potential of genome‐wide analyses to uncover a range of evolutionary processes affecting invasive populations.