Experimental Tests of the Roles of Adaptation, Chance, and History in Evolution

The contributions of adaptation, chance, and history to the evolution of fitness and cell size were measured in two separate experiments using bacteria. In both experiments, populations propagated in identical environments achieved similar fitnesses, regardless of prior history or subsequent chance...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1995-01, Vol.267 (5194), p.87-90
Hauptverfasser:	Travisano, Michael, Mongold, Judith A., Bennett, Albert F., Lenski, Richard E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Adaptation (Biology) Adaptation, Physiological Bacteria Bacteriology Biological adaptation Biological and medical sciences Biological Evolution Cellular biology Cultural values Ecological competition Environment Error of Measurement Escherichia coli Escherichia coli - cytology Escherichia coli - genetics Escherichia coli - physiology Evolution Evolution (Biology) Evolutionary adaptation Fundamental and applied biological sciences. Psychology Gene Frequency Genetics Genotype Genotypes Glucose - metabolism Maltose - metabolism Measurement Techniques Microbiology Mutation Phenotype Phenotypic traits Population characteristics Population dynamics Population mean Temperature
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Beschreibung
Zusammenfassung:	The contributions of adaptation, chance, and history to the evolution of fitness and cell size were measured in two separate experiments using bacteria. In both experiments, populations propagated in identical environments achieved similar fitnesses, regardless of prior history or subsequent chance events. In contrast, the evolution of cell size, a trait weakly correlated with fitness, was more strongly influenced by history and chance.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.7809610