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arXiv 1302.2906q-bio.PEnlin.AO
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预测进化和可视化高维适应度景观

Predicting evolution and visualizing high-dimensional fitness landscapes

Bjørn Østman, Christoph Adami

摘要:

适应过程的节奏和模式在很大程度上取决于适应度景观的结构,为了能够预测进化结果(即使是短期的),我们必须比现在更了解现实适应度景观的本质。例如,为了知道进化是否主要沿着适应度向上移动的路径和中性脊,或者需要大量的山谷交叉,我们需要能够想象这些景观:我们必须确定景观中是否有峰,这些峰相对于彼此的位置,以及进化路径是否可以连接它们。这是一项艰巨的任务,因为遗传适应度景观(与基于性状的景观相反)是高维的,并且缺乏可视化这种景观的工具。在这方面的贡献,我们专注于崎岖的遗传适应度景观的进化的可预测性,并确定在这样的景观的高峰高度聚集:高峰主要是接近其他高峰。因此,将这些山峰分开的山谷是浅而窄的,使得朝向景观中最高峰的进化轨迹可以通过一系列山谷交叉来实现

英文摘要:

The tempo and mode of an adaptive process is strongly determined by the structure of the fitness landscape that underlies it. In order to be able to predict evolutionary outcomes (even on the short term), we must know more about the nature of realistic fitness landscapes than we do today. For example, in order to know whether evolution is predominantly taking paths that move upwards in fitness and along neutral ridges, or else entails a significant number of valley crossings, we need to be able to visualize these landscapes: we must determine whether there are peaks in the landscape, where these peaks are located with respect to one another, and whether evolutionary paths can connect them. This is a difficult task because genetic fitness landscapes (as opposed to those based on traits) are high-dimensional, and tools for visualizing such landscapes are lacking. In this contribution, we focus on the predictability of evolution on rugged genetic fitness landscapes, and determine that peaks in such landscapes are highly clustered: high peaks are predominantly close to other high peaks. As a consequence, the valleys separating such peaks are shallow and narrow, such that evolutionary trajectories towards the highest peak in the landscape can be achieved via a series of valley crossings

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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