SEX AND SELF-ORGANIZATION ON RUGGED LANDSCAPES

Jan Finjord ()
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Jan Finjord: Stavanger College, Faculty of Science and Technology, P. O. Box 2557, N-4004 Stavanger, Norway

International Journal of Modern Physics C (IJMPC), 1996, vol. 07, issue 05, 705-715

Abstract: The two-parent reproduction model of Derrida and Peliti is simulated on a rugged fitness landscape. Fixed fitness values for each possible genotype are assigned randomly, with all fit individuals having the same probability of reproduction. The previously observed transition to a self-organized state of the population with less recombinational load, implies an abrupt change of genetic overlap distributions, showing up characteristics of a phase transition. A crossover variant of the model has a smoother transition to the adapted regime, with a residual collective adaptation for small values of the threshold in fitness. When a geographical constraint (shortest possible distance) on pairwise reproduction in a population arranged one-dimensionally is imposed, a poised state results, suggestive of self-organized criticality.

Keywords: Collective Adaptation; Derrida–Peliti Model; Two-Parent Reproduction; Rugged Fitness Landscape; Phase Transition; Self-Organized Criticality (search for similar items in EconPapers)
Date: 1996
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DOI: 10.1142/S0129183196000582

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