Predicted fitness changes along an environmental gradient |
| |
Authors: | Daniel E. Dykhuizen Antony M. Dean |
| |
Affiliation: | (1) Department of Ecology and Evolution, SUNY at Stony Brook, 11794-5245 Stony Brook, NY, USA;(2) Department of Biological Chemistry, University of Health Sciences/The Chicago Medical School, 3333 Green Bay Road, 60064-3095 North Chicago, IL, USA |
| |
Abstract: | Summary The relations between enzyme activity and the intensity of selection across an environmental gradient are investigated usingEscherichia coli growing on mixed resources. Experimental results demonstrate that the direction and intensity of natural selection can be predicted solely from a knowledge of the underlying biochemistry, physiology and ecology of the organism. Ecological theory, based on the logistic equation, is unable to use this information to predict the outcome of competition — the best it can do is to fit constants to data points. Our results also suggest that partitioning of the phenotypic variance using quantitative genetics need not correspond to the underlying molecular structure generating phenotypes. |
| |
Keywords: | Escherichia coli environmental gradient fitness lactose operon |
本文献已被 SpringerLink 等数据库收录! |
|