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arXiv 1004.5537q-bio.PEcond-mat.stat-mech
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强相关适应度景观上的演化动力学

Evolutionary dynamics on strongly correlated fitness landscapes

Sarada Seetharaman, Kavita Jain

摘要:

我们研究了自复制序列在强相关适应度景观上的不适应种群的演化动力学。每个序列被假定为由相等长度的块组成,并且其适应度由四个独立块适应度的线性组合给出。突变影响单个块的适应度贡献,而其他块保持不变,从而引起亲本和突变体适应度之间的相关性。在这种强相关的适应度景观,我们计算的动态特性,如跳跃的数量在人口最多的序列和时间分布的最后一跳,表现出平方反比的依赖性,在不相关的适应度景观的演变。我们还获得了精确的结果,相关的随机变量的记录和极值的分布。

英文摘要:

We study the evolutionary dynamics of a maladapted population of self-replicating sequences on strongly correlated fitness landscapes. Each sequence is assumed to be composed of blocks of equal length and its fitness is given by a linear combination of four independent block fitnesses. A mutation affects the fitness contribution of a single block leaving the other blocks unchanged and hence inducing correlations between the parent and mutant fitness. On such strongly correlated fitness landscapes, we calculate the dynamical properties like the number of jumps in the most populated sequence and the temporal distribution of the last jump which is shown to exhibit a inverse square dependence as in evolution on uncorrelated fitness landscapes. We also obtain exact results for the distribution of records and extremes for correlated random variables.

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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