A non-adaptationist perspective on evolution of genomic complexity or the continued dethroning of man.
A new, non-adaptationist theory of evolution of genomic complexity was recently proposed by Lynch and Conery. This concept holds that increase in complexity seen in eukaryotic genomes is a 'syndrome' caused by increase in genome entropy, which is inevitably triggered by reduction of population size. Here, I discuss the definitions of genomic entropy and complexity and the evidence supporting the entropic theory of genome complexity evolution, including new observations on concordant gain and loss of genes and introns in eukaryotic genomes. I further consider the far-reaching biological and philosophical implications of this theory.
Koonin
Eugene V
EV
National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bldg. 38A, Bethesda, Maryland 20894, USA. koonin@ncbi.nlm.nih.gov
D000220:Adaptation, Biological / Q000235:genetics; D000818:Animals; D019277:Entropy; D004777:Environment; D005057:Eukaryotic Cells / Q000378:metabolism; D019143:Evolution, Molecular; D005796:Genes / Q000235:genetics; D016678:Genome; D006801:Humans; D007438:Introns / Q000235:genetics; D008297:Male; D008957:Models, Genetic; D011156:Population Density