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trans gene regulation in adaptive evolution: A genetic algorithm model

Behera, Narayan and Nanjundiah, Vidyanand (1997) trans gene regulation in adaptive evolution: A genetic algorithm model. In: Journal of Theoretical Biology, 188 (2). pp. 153-162.

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This is a continuation of earlier studies on the evolution of infinite populations of haploid genotypes within a genetic algorithm framework. We had previously explored the evolutionary consequences of the existence of indeterminate—“plastic”—loci, where a plastic locus had a finite probability in each generation of functioning (being switched “on”) or not functioning (being switched “off”). The relative probabilities of the two outcomes were assigned on a stochastic basis. The present paper examines what happens when the transition probabilities are biased by the presence of regulatory genes. We find that under certain conditions regulatory genes can improve the adaptation of the population and speed up the rate of evolution (on occasion at the cost of lowering the degree of adaptation). Also, the existence of regulatory loci potentiates selection in favour of plasticity. There is a synergistic effect of regulatory genes on plastic alleles: the frequency of such alleles increases when regulatory loci are present. Thus, phenotypic selection alone can be a potentiating factor in a favour of better adaptation.

Item Type: Journal Article
Publication: Journal of Theoretical Biology
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Biological Sciences > Molecular Reproduction, Development & Genetics
Date Deposited: 27 Jan 2010 12:10
Last Modified: 19 Sep 2010 05:51
URI: http://eprints.iisc.ac.in/id/eprint/24676

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