Representation of genotype and phenotype in a coherent framework based on extended L-systems

Abstract

A formal language approach for the specification of ALife models is presented. "Relational Growth Grammars" incorporate rulebased, procedural and object-oriented concepts. By enabling parametric Lindenmayer systems to rewrite multiscaled graphs, it becomes possible to represent genes, plant organs and populations as well as developmental aspects of these entities in a common formal framework. Genetic operators (mutation, crossing-over, selection) take the form of simple graph rewrite rules. This is illustrated using Richard Dawkins' "biomorphs", whereas other applications are briefly sketched. The formalism is implemented as.partof an interactive software platform.