The effect of population structure on the adaptive radiation of microbial populations evolving in spatially structured environments
The effect of population structure on the adaptive radiation of microbial populations evolving in spatially structured environments
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DOI：
10.1111/j.1461-0248.2006.00955.x
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发表时间：
2006-09-01
期刊：
影响因子：
8.8
通讯作者：
de Visser, J. Arjan G. M.
中科院分区：
文献类型：
--
作者：
Habets, Michelle G. J. L.;Rozen, Daniel E.;de Visser, J. Arjan G. M.
空间结构被认为是影响遗传多样性产生和维持的重要因素。以往的研究表明，由空间结构提供的环境异质性导致种群的适应性辐射。在本研究中，我们不仅研究了环境异质性对适应性辐射的影响，而且还研究了种群破碎化和生态位构建。由单一基因型的大肠杆菌建立的重复群体被允许通过在均质环境或空间结构化环境中连续转移进化900代，所述空间结构化环境在每天的转移中保持完整或被破坏。只有在结构化的环境与完整的人口结构多样化的人口发展：克隆显着分歧的糖catalysts，并表现出频率依赖的健身相互作用表明稳定共存。这些研究结果表明，一个重要的作用，人口碎片化，人口结构的空间结构化的环境中，对人口的多样化的后果。
Spatial structure is thought to be an important factor influencing the emergence and maintenance of genetic diversity. Previous studies have demonstrated that environmental heterogeneity, provided by spatial structure, leads to adaptive radiation of populations. In the present study, we investigate not only the impact of environmental heterogeneity on adaptive radiation, but also of population fragmentation and niche construction. Replicate populations founded by a single genotype of Escherichia coli were allowed to evolve for 900 generations by serial transfer in either a homogeneous environment, or a spatially structured environment that was either kept intact or destroyed with each daily transfer. Only populations evolving in the structured environment with intact population structure diversified: clones are significantly divergent in sugar catabolism, and show frequency-dependent fitness interactions indicative of stable coexistence. These findings demonstrate an important role for population fragmentation, a consequence of population structure in spatially structured environments, on the diversification of populations.