物理学报Issue(10)：1-5,5.DOI:10.7498/aps.63.108701
随机化的Eigen模型研究
Eigen mo del of randomness in sp ecies evolution
乔丽华 1赵同军 2顾建中 3卓益忠1
作者信息
- 1. 河北工业大学理学院，生物物理研究所，天津 300401
- 2. 中国原子能科学研究院核物理研究所，北京 102413
- 3. 河北医科大学基础医学院，石家庄 050017
- 折叠
摘要
Abstract
We modify the deterministic Eigen model of species evolution into a randomized model in order to render the Eigen model more realistic for the description of species evolution. In the framework of the Eigen model, we regard the locus mutation rate of a genetic sequence as a Gaussian distributed random variable. Thus the Eigen model turns into a random model. In this randomized model, we can see that when the fluctuation strength of the mutation rate is small, the error threshold of the quasispecies changes slightly and still serves as a phase transition point. However, when the fluctuation strength becomes large, the error threshold shifts from a phase transition point into a crossover region. Since the error threshold in the real species evolution is a crossover region, we should consider the upper limit of the crossover region when dealing with practical problems.关键词
高斯随机变量/突变率/准物种/误差阈Key words
Gaussian distributed random variable/mutation rate/quasispecies/error threshold引用本文复制引用
乔丽华,赵同军,顾建中,卓益忠..随机化的Eigen模型研究[J].物理学报,2014,(10):1-5,5.
