Dlugosch Katrina M, Hays Cynthia G
Department of Botany, University of British Columbia, Vancouver, BC, Canada V6T 1Z4.
Mol Ecol. 2008 Nov;17(21):4583-5. doi: 10.1111/j.1365-294X.2008.03932.x. Epub 2008 Oct 8.
When we set a species loose outside of its historical range, we create opportunities to test fundamental questions about how populations establish, adapt, disperse, and ultimately define range boundaries. A particularly controversial issue here is how genetic variation among and within populations contributes to the dynamics of species distributions. In this issue of Molecular Ecology, Rosenthal and colleagues (2008) seize an opportunity to examine how multiple introductions create genetically distinct establishment events and how these are incorporated into invasive spread. Their findings suggest that a particular recombinant lineage of Brachypodium sylvaticum may be responsible for most of the recent expansion of this invader, highlighting the potential importance of genetic novelty and historical context for colonization success.
当我们将一个物种放生到其历史分布范围之外时，我们就创造了机会来检验有关种群如何建立、适应、扩散以及最终界定分布范围边界的基本问题。这里一个特别有争议的问题是种群间和种群内的遗传变异如何影响物种分布动态。在本期《分子生态学》中，罗森塔尔及其同事（2008年）抓住机会研究了多次引入如何产生遗传上不同的建立事件，以及这些事件如何融入入侵扩散过程。他们的研究结果表明，一种特定的短柄草重组谱系可能是这种入侵者近期大部分扩张的原因，凸显了遗传新奇性和历史背景对定殖成功的潜在重要性。
